In the past, tradition was one of ways to pass knowledge. There was no youtube or google available and people were generally were not able to read or attend classes.
Even today you teach your kids certain things they just have to do before they can have knowledge of why. For example brush their teeth.
Even then, repeating things like that is still one of the ways we cope with complexity of the world around you.
I am certain you are probably repeating some instructions from somebody on how to do something just because there is no time in the world for you to evaluate every single simple thing and decision.
On the other hand if somebody starts writing about it and discuss with other people, I expect them to put at least a little bit of effort into thinking about it if you are equipped for it (or shut up if you are not).
Repeating mindlessly on the Internet things you learned from somebody else is one way the world is broken today.
Of course there would be consequences if you were rude. Just not to you.
For some reason people conflate the two and then it is difficult to have a civil discussion on the Internet.
Don't agree with somebody's response? Don't try to shift the discussion to something else like the particular choice of words and whether you "feel" it was rude. If you can't or are not willing to discuss the actual arguments it is better to stay silent.
The GP saving water would have no impact at all on the people that miss it. It's not a "do your small part", it's simply no part at all.