Blimey... that is the I have been here longer than you and should therefore be paid more, deferred to and respected line.
The time required for essential training; e.g. HSE how not to poison guest, and retaining customers is in weeks,
not the years required for training a brain surgeon.
It almost seems like you're trying to deliberately misunderstand me
There are bad chefs that are in their 50s and 60s, I'm sure. But the fact of the matter is it's not a theoretical profession. You have to actually do it, practise it, refine it. It's a very physical job (moreso for a chef than a waiter, naturally). As such, it's not training in the way my job (for example) requires training. I'm a software developer. There are plenty of guides on how to read an API, consume its response, and render it in a variety of software frameworks.
I can show someone how to do that very simply, in a lot of cases. I can't
show someone how to skin potatoes at the speed required at peak time in a restaurant. Heck, I still can't. I suck at chopping fast, skinning thing fast - prep stuff. And I had a few years experience! It's something that requires constant practise to keep the skills sharp.
Conversely, my job, a lot of the training was up front. I learned programming. I learned software frameworks. What has developed as I've gotten older is my ability to read languages I'm not familiar with. To make better educated guesses. To learn new thing faster, because I understand the fundamentals that they're based on. I've recently had to pick (back) up technologies I haven't used in about six years. It took me less than a week to get comfortable. Far faster than training a new hire. But a new hire could get by if shown the exact steps to do the processes we needed doing (that required me to get stuck back into something I stopped doing those years back).
Meanwhile, my dad literally runs a restaurant, and has been a chef (in total, from beginner to where he is now) for . . . four decades? Nearly, anyway. And even though he's decades older than me, and we both know how to chop an onion, he could do six in the time I can do one. With the same tools. That's what I mean by experience. Not that he's better just because he's older than me. But he's better because he's been refining those skills for longer than I've been alive. He understands what his body is capable of, what techniques work for him, what don't.
It seems to me that you simply don't value the skills required for the profession(s) being discussed. Or you made an awkward, early judgement on the training required and now for some reason are sticking with it, instead of admitting the judgement was a bit rash. Or maybe there's another reason - those are just the ones that have occurred to me.
Don't be coy. You didn't have to qualify your statement, I'm fully allowed to let mine stand. If it's something at this late stage in the process that you actually want to read more about, there's plenty a Google search away.