You give three good reasons why many experienced users here are not very active or as active as you and I would like. Unfortunately, this is a problem that exists for a long time. There aren't and there haven't been many active experts on this site (from my perspective, without looking into the details/statistics, only 2-3 users regularly answer questions and almost nobody cares about editing posts to clarify them, although I've observed a small improvement in this area in the last weeks).
In my case, I am busier now than in the past two years because of my professional activity, so my activity on the site has gone down a little bit, although I try to visit the site every day and even several times a day, but, unfortunately, I am not able to edit as many posts as I used to in the past and to provide answers regularly, which sometimes require a little bit of time and effort. I've actually stopped contributing to other Stack Exchange sites in order to focus on this site, which, as you also noticed, requires more experts, in order to make new users more engaged.
I think that we haven't yet attracted many experts because experts in an AI topic are typically very busy (solving their problems in research, academia or industry), so typically you will not find many people that are doing active serious research on an AI topic here.
To attract more experts, we could advertise our site and talk about this site to people that are interested in AI. However, to attract more experts, I think it's very important to keep the quality of the site high. So, for instance, if you see a bad question/answer, you should downvote it. If you see a post that is not written clearly, either downvote it or, if you have time, edit it to improve its clarity and structure. I've been trying to do this for a long time. I've noticed a little bit of progress in terms of people providing answers, but not as much as I would like: we don't have many active users regularly: a new oneuser comes for a few weeks or months, another one goes for many months or forever. So, if you really believe in this site, as I do, stay around and try to help the community in whatever way you can :)