Perhaps but Anutin's hatred of all things foreigner would overcome that. Thailand is trying, again, to attract the 'better off' expat, see the LTR visa for further evidence. Eliminating dodgy agent facilitated extensions could make giant leaps down that path. Again only my opinion but it wouldn't surprise me at all if a crackdown came for that very reason. It's low hanging fruit.
Capital growth severly depleted by tax, upkeep and CGT! subtract further the rent you've given to someone else and I'd be surprised if you emerge from that lot on top!
so your smarter man is now facing tax and CGT when they come to sell in the UK whilst donating money to a home owner in Thailand - your definition of smart needs some work.