I mean, that's lovely, but it's pretty off-topic.
The thread topic is an important and valid question - what are the corebook races going to look like under the modern race design paradigm WotC are using. Talking about Level Up's approach is a distraction from that. You might as well discuss Pathfinder 2E's approach. We know, approximately, the sort of approach WotC is taking, and it's very much not the Level Up one, for better or worse.
I think a lot of people don't want to complicate the rules further, which is actually an objective of Level Up (as I understand it), and further, a lot of people (10m) use D&D Beyond. And D&D Beyond lets you use 3PP material, but only within the broad constraints of existing D&D. You can easily write a new race or the like, but you can't introduce new systems. This means that the value of 3PP material is decreased significantly for those 10m unless it fits within existing bounds. Adventures become the most valuable 3PP asset under this scenario. So you're not merely fighting an "attitude", you're fighting practicality, which is a much harder thing to deal with. And WotC is probably going to double-down on this, rather than taking an inviting attitude to 3PP material, because it benefits them and locks people in to their "ecosystem", which as they continue to want to be a "lifestyle" brand and not just a game will only be reinforced.