The first thing my rebbe asked me when i wanted to take on a certain chumra, was whether or not my father was makpid.
He wasn’t.
But to daas Torah, shteiging cannot be done at the expense of disappointing a parent – unless of course we’re talking about a parent who’s שונא תורה and doesn’t want their kid to learn; for that we say kovod Hashem is more important.
A healthy child wants to serve Hashem and make his parents happy. The push for children to be their own person leads to foresaking mesorah and eventually going off the derech when the person thinks “this isn’t for me.”