It's a bit six of one, half a dozen of the other.
If we're going to pretend most people don't generally prefer smooth hair free legs, then ok, but it's just how it is. Irrespective of the odd one or two who prefer it au natural.
Should it matter, being all pc and that, no. Does it make a difference, in the real world, yes. And I don't think DH is being unreasonable for communicating his preference. Doesn't mean you have to act on it.
We're you (please don't take offence, can't think how else to phrase) better groomed in the past, so he's commenting on the fact that he thinks you don't want to make an effort anymore, and just picked your body hair as an example?
Of course, you don't have to be well groomed for anyone, but it's not a big ask, and if it would make DP happy, it's such a small thing to do, if you're not majorly fussed either way, why not?
If my DP had said something like this to me, I'd be perfectly OK with spending an extra 2 mins in the shower to make my partner happy. It's not a big sacrifice really. The once you're in a long relationship, he should love you regardless, is a bit of a mute point. He's just asking for a tiny thing that would be virtually zero effort for you, but he'd appreciate. Why that has to be something to complain about is beyond me.