My point is the community really isn't supporting it. And 3PPS are thus running to make D&D clones and compatible stuff.I don’t think that’s quite fair. There are a lot (A LOT) of alternatives out there. And more every month.
There is no shortage of alternatives. The real question is why D&D and it’s clones and prior editions have a stranglehold on the market.
You would think in a world of Kickstarter and Patreon and better acceptance of nerd culture, things outside of the D&D verse would rise to be notable forces in TTRPGs. But it's really only the stuff that been here since before the turn of the century. Because the community doesn't support it and thus call for an openess that doesn't exist in any other gaming sphere.
TTRPGs just lives in this weird place legally and community wise.