I don't agree completely with the OP, but there's more merit than people are giving credit for.
I think a lot of people are either stuck in pre-BNW culture habits or mislead by the misnomer of "culture victory." Tourism wins culture victories, not culture. Culture defends against opponents culture victories. Culture is a by-product of culture victories as running artist-class specialists yields culture as do GWs.
As far as aestheics, the opener is probably the most powerful CV tool as far as SP's (except for sacred sites), and the finisher is very powerful if your civ is making a lot of faith(But can be replaced by (GtG). You'll want to open it ASAP and finish it when you hit industrial. All five policies in between help your culture, and consequently policy acquisition, but are otherwise completely ineffective in winning a culture victory:
-Fine Arts: happiness gives bonus culture, none of which is ever added to tourism, even with hotels/airports. Net bonus to TOURISM: 0
-Cultural centers: helps you make a bunch of empty slots, but they don't add to tourism until they're filled, and this policy in no way helps you fill them Net bonus to TOURISM: almost 0
-Artistic Genius: One...single...GA, which translates to one...single...GW... and it drives up the price of future GAs. Net bonus to TOURISM: 2
-Flourishing: free golden age, which adds more culture, none of which is ever added to tourism, even with hotels/airports, and all cities with a wonder make a lot more culture, again none of which is ever added to tourism, even with hotels/airports. Net bonus to TOURISM: 0
-Ethics: cheaper future SPs. Net bonus to TOURISM: 0
5 policies for a total of 2 tourism, and the 2 that are there drive up the price of getting the next 2. The opener and finisher make it a good choice for CVs, but hardly a must-have.
There's absolutely no need to finish Aesthetics before NVC/Internet. Multiplicative yields are only so good as your raw output is which is awfully low until the very late game unless you went aggressive and plundered dozens of great works. Going through rationalism faster, opening explo to still get Louvre and/or commerce for big ben and trade route output and/or going through ideologies faster all have a larger impact on your turn-to-victory or expected chances to win as CV than clearing aesthetics fast.
There are really only 2 essential elements to victory in aesthetics. Opener and finisher. The finisher, sadly, to a much larger extent on higher difficulties so unless a neighbor spreads his religion and provides you with the reformation belief, you simply want to time the last 4-5 SPs of your game before internet in aesthetics.
CC is only good as it helps you survive the extreme hammer requirements of the mid game between wonders, archaeologists and managing to build the museums within the timeframe.
Conversely, the net gain of exploration is a marginal chance at landmarks which typically won't be near your cap anyway as landmarks are typically nearby battles made and odds are there was no barb camp within 3 tiles of cap so the optimal tourism output of a single extra landmark, assuming freedom, enacted resolution hotels AND airports is 14 base TPT.
5 SP is a pricy cost for chances at a few extra 14 TPT. I'd like to say it can be a wise choice if you went with wide CV and need the help to fill out all of your museums but sadly, expansionist wide doesn't scale well for CV. NVC is just too powerful. Wide CV is only as good as the number of great works you plunder from enemies.
10 non-capital cities with each 1 full landmark and a filled museum through exploration will provide 24 base TPT each. It is not to be ignored but realistically you wont be able to manage the happiness of a wide freedom empire, you will get to internet later, any 2 lame non-CV wonders that you could've built through a taller stronger capital by not overexpanding/feeding/faster teching in early game would've provided 16 base TPT further scaling with enacted world religiong to come up extremely close to a themed wide museum.
So anyway - provided that you can get a dozen city up and keep the tech pace, get a neighbor to spread his reformation belief for GM purchase and no AI competes on full explo dig sites, you could turn a liberty+explo game into a decent CV but on higher difficulties, this is near impossible. In all other cases, powering a capital enough to get wonders, even the lamest (since +3 culture per wonder is so easy to enact), will provide you a far better chance to win