I agree with your fundamental point, learning new shit is definitely fun for me. But there’s lots of different people and some just don’t. I can definitely sympathize with someone who’s income depends on one of these workflows, and why they can’t disrupt that for “fun learning sake”. There’s only so many hours in a day and some people have different priorities.
Your second point is key. In an ideal world, open source could rival and even beat the best paid offerings (see: blender). But in most cases it just doesn’t. There’s not a dedicated team working on the open source products, working with HCI experts and designers on every detail of the product. It doesn’t preclude the open source being better (see, again: blender), but it does push a LOT of workload onto a bunch of hobbyist developers working in their spare time. The resultant burnout is typically why you see these projects sputtering along for years and years. I don’t know how to solve those problems either, but they’re your real “roadblocks”.