Without knowing where you are exactly, I can only give a vague and general response such as "in much of the USA, the mere existence of a lawn is 'over maintained'", see also https://en.wikipedia.org/wiki/Xeriscaping

Oh I don't live in Nevada or Arizona, if that's what you were implying. Also, this thread is about the utility of HOAs, so in the example you're giving, then HOA can actually be more beneficial since they often include bylaws to restrict or prevent landscaping and watering during periods of water conservation. It goes both ways.

What I'm implying is: HOAs can mandate bad things, including in various cases lawns, because an absence of good reasoning when mimicking others isn't the preserve of individuals.