Re: minimalist training, I agree with a caveat.
I'm not against the use of sensible assistance exercise, or even occasionally doing stuff just for fun. I do plenty of workouts that are "eh, I just felt like doing this today, so I did that" workouts.
However, when the trainee lists a specific goal of "be good at Olympic weightlifting" that's when I start to get a little "ehhhh, does that really help the trainee?" at this type of discussion.
Dan John has a very simple maxim, somewhere, of
"Look at your training. Look at your goals. Does your training match your goals?"
Since I have the very vague "Be fit and capable and sorta strong" goal, I can make myself justify damn near anything! I win! But when OP (or anyone) lists a specific goal of "Become a really good Olympic weightlifter" then there seems to be a limited place for those kind of extras.