See I think the bigger problem there is that, having used both myself, FreeCAD and Inkscape both have really sucky UX (the former more than the latter, to be sure).

A better comparison would be Canva. Can I do everything in Canva that I can in Illustrator? Not by a long shot. Is it still good enough for 80% of the things I need to do? Absolutely. Is it a delight to work with despite its comparative simplicity? You bet.

So I agree that time and pain saved is hugely important, but that's an orthogonal axis to how advanced a tool is. The two only really correlate when you're doing things that need that advanced tooling in order to avoid a lot of manual work.