Discord chat, Expat licence, GitHub repository... perhaps we also need a good UI library that manifests a greater desire to cultivate user rights. I'd say that's just as important as technological advancement, if not more.
If my actual opinion interests you, I might lean towards the LGPL, rather than the GPL. I find both of them more beneficial than any of the MIT licences for a UI framework, but strong copyleft might do more to hamper widespread adoption and interest in the project, which seem an important factor as well.
It's a valid concern, but consider that some persons put a lot of effort into making open source software and then share it to be nice, or for the public good.
So to people chime in and complain that it's not good enough can seem obnoxious and/or ungrateful.
I do wish more things were covered under licenses with strong "copyleft", but I don't begrudge anyone the ability to license their hard work however they please.
Google gives us Chrome for free. Does that make it distasteful to question their decisions around using our data because they’ve made it free?
At least I think that's what the person you replied to is trying to get at.