In each of those cases, none of those occupations can be really be interwoven into your life as tightly as a job where +90% of your labor is done via a laptop computer. If you're a farmer, woodworker, etc. you still need a separate place of work from where you live, be it a workshop or the fields. In the evening when the farmer returns to his house to rest, there is no question he's done for the day, and he can fully relax and sleep.
The dangerous mindset is that if you're capable of working whenever and wherever you are, then why should you ever really disconnect? This problem is an epidemic with people who don't know how to create a mental separation between work life and everything else, and I would argue that although it's easier to fall in the trap if you work over a VPN, it can also happen for any worker that is permitted/encouraged to work at any time of the day regardless of the situation.