Interesting how there's a polarization here between 'You can't do it' and 'You can do it'.
Of course there are variables we don't know -- children, marital status -- but the simple truth is that a lot of people have done it, or are still doing it, and are/have been both successful and happy, so it can't be impossible. Of those who say it can't be done, I suspect that there are quite a few reasons for their assertions:
1 They are unable or unwilling to live up to the and pay for it clause in 'Take what you want, and pay for it, saieth the Lord', in the sense of e.g. fitted kitchens, central heating and new cars.
2 They are congenitally afraid of doing anything unusual, and so have never tried it
3 They have tried it, and been unlucky
4 They have tried it but (as Fred suggests) are so talentless and uncommitted to photography that there is no point
5 They don't see why anyone would do it, cf Carlsen's "I have wandered the earth and . . . not found much to recommend [it]' This is the exact opposite of my own experience.
As my wife and I grow older, several things get in the way of our travelling, especially her health: if it weren't for that, we might well be living in India now. But otherwise, we both love to travel as much as we can afford, and so we do. As I said in an earlier post, we've always had a base (like most of the people I know who've done this for years) because it's much easier to earn money from a fixed base and because it's a good place to rest between trips. But it's a rare year that we're not on the road for at least 2 months, and our record in one tax year was 7 months.
Cheers,
Roger