For example, I've been doing freelance work for well over 10 years now and I eventually started insisting on having an extra office with a strict policy of the room is for work only (even if not paying work). The thing is, a lot of people will recommend things like dressing up as if you're going into work, taking a walk around the block as a transition, and so forth. But for me I can literally walk into that room completely naked straight from bed and have no issues.
But the thing is, what works for me doesn't work for you (and vice versa). But I've had over 10 years to figure out what works for me, young people haven't.
That's where their challenge is at, not in trying to learn from mentors, which can still happen even remote.
And some people just can't do it because they don't have the discipline and never will. Those people will fail, but that's on them.