I would be sceptical, nay dismissive, of anyone expressing an opinion based on reflection 'in his point of view'. That's not so much an outlook on life as a good hard look at his toes, or his navel!
The expression is, "from my point of view" - an outward-looking observation of 'life'.
The Internet also spreads viruses...and bad grammar!
This has nothing whatsoever to do with grammar, David. You've proven with your little anecdote, that you can see a situation in life where '
in his point of view' works. That makes it part of language and a possible collocation.
Don't you realize how odd parts of BrE can sound to others. This only illustrates that we get comfortable with what is normal for our own dialects of English. It doesn't make other possibilities wrong/ungrammatical. That too, would border on the absurd.
You play the dismissive card a bit too readily, as if it has any merit when making decisions on how language works. The proof card remains firmly buried on the bottom of the deck.
Googled - specified USA region
Results 1 - 10 of about 1,820,000 English pages for "from my point of view".
Results 1 - 10 of about 1,350,000 English pages for "in my point of view".