I do, and it’s not for entirely altruistic reasons either.
When I’d open a thread on reddit, if I wasn’t there within the first hour of being up or first dozen or so comments, it was almost guaranteed that whatever I said would get buried and the effort I spent formulating my comment would basically be wasted. So there was very little incentive to engage with meaningful discussion just for the sake of discussion. On Lemmy, most posts struggle to get over a hundred comments at most, and even more struggle to get past ten. So, if I spend time developing my reply, I have a higher chance of that comment getting seen and other people in the community engaging with me, which is the entire point of leaving comments, IMO.