while I'm happy to continue the exchange, I'd appreciate it if it didn't continue any longer than was useful to you.
Um... well, OK.
I have to admit, I don't quite understand, either from this post or this thread, what you think the negative consequences are which these social norms protect against... the consequences you imply all seem like consequences of violating a social norm, not consequences of the social norm not existing.
Perhaps I'm being dense.
Regardless, I'm only idly interested, so if you'd rather disentangle I'm happy to drop it.
Well, unwarranted advice can result in making someone feel patronised, or like their privacy or personal boundaries are being violated, or like their personal circumstances are subject to public speculation, and these are all unpleasant and negative experiences, and you should try and avoid subjecting people to them.
It can also, out of nowhere, create a whole raft of dubious questioning or accidental insinuation that the recipient of the advice may feel obliged, or even compelled, to put straight. It has a general capacity to generate discussion that is a ...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.