Nobody is denying that workboat-first is a good option to consider on coastal starts with Fishing. In fact, searching this thread for every time someone other than you mentioned the word "workboat," here's the results:
Or this post...
Or this one...
Oh, and also...
The fact that workboat-first openings are often a good idea (and everyone acknowledges this) does not mean that warrior-first openings are also often a good idea.
Bah, I wrote whole text and the browser decided to remove it without giving me the option to undo.
Yes the analysis have been done before, worker first is always better, if your not doing worker or workboat first you are probably hurting yourself.
If you are doubting the power of worker first then you shouldn't not be considering opening of settler first or warrior first, stick to worker/workboat first understand why they are better then you can consider starting wth something else.
Or this post...
4 warriors seems extreme. I like to keep it simple, so I go worker if it seems I can make use of it all the time, warrior otherwise, workboat on water starts.
Or this one...
What about the special case in which the capital has only calendar resources and fish, and you start with Fishing?
I recently was in that circumstance, and I built two workboats first and after that had vast quantities of food for building a settler with. That game turned out fine.
Oh, and also...
If you start on the coast with fish, starting with Fishing, workboat first is probably the best strategy. In the case you give, it's the obvious start. If I have Fishing and seafood, I usually go Workboat first and juggle my tiles so the workboat comes out right at pop 2. Then I start my worker (or possibly another workboat as in your start).
For most starts I go worker first, same as the better players.
The fact that workboat-first openings are often a good idea (and everyone acknowledges this) does not mean that warrior-first openings are also often a good idea.