I don't think that is true/fair. They have responded to feedback pretty well as far as I have seen. Just usually after the fact rather than before. Hell the beta alone has seen some significant changes based on player response. I think it's fair to say they don't respond to feedback on their initial vision when it is announced or developed. They tend to wait to let it actually get into our hands before they start iterating. So it can be frustrating to read dev diaries where a big chunk of the playerbase is saying "x won't work" and basically be yes'd and explain'd to death while they charge forward with it. But in my experience once "x won't work" morphs into "x is not working" they are good at listening and working on it until they get it right.
It does feel like in this case that the changes are so big that we may end up spending the better part of the year dealing with balance/fun issues until they arrive at the sweet spot. I just hope it's not something that lingers throughout the rest of lifespan of Stellaris where they are constantly having to tinker with it and they can't scrap it because everything is tied into it now.
I think this is broadly true, they DO take negative feedback and I've observed that multiple times, plus some of the feedback they've taken was mine.
But even if they take it eventually, there isn't infinite time available and there's also DLC. Again, think of the tile->pop rework. Sure, some of the problems that introduced (lag, growth) are being addressed literally in 4.0.
But they weren't introduced within the last year. Or even two years. Or five. It was actually around six years ago, and
just now they're fixing those problems that have been present in the district system from the beginning.
If they keep iterating this after release, I think with enough work it can simply be an improvement with no major issues. Past experience indicates that they won't actually do that though, and I hate to be that negative but if they wanted me to just trust that it will be worked on until it's good they probably should have waited until they had a track record of doing just that, not coming off a year of fire-and-forget DLC with one (Cosmic Storms) so terrible that almost everyone who mentions it at all does so to say they have it disabled. And it's not as if that's the only one, First Contact and Astral Planes have some severe problems too.
Fixing it at all matters, but so does fixing it in a timely manner. When will Cosmic Storms be fixed? Well, they've yet to even say "it has problems but we're thinking of ways to fix them" so... never? What about First Contact and Astral Planes? Well, they've acknowledged some of those problems, but with no mention of actually fixing them, so... also never, probably.
Breakthrough techs and the problems on release for Galactic Paragons being fixed relatively quickly are the exception, not the rule. They said they wanted to ensure better QA this year, and if that's true this should eventually work out. I don't believe it though, because there's no indication of it actually happening yet. This is the first thing they'll have done since acknowledging they needed better QA, and so far it doesn't seem to have that.
I would be a lot more willing to give them the benefit of doubt on 4.0 turning out well if they were continuing the beta until they had a good design and THEN announcing a release date when they just need to polish it. As it is, they're going to ship it as, most likely, a dumpster fire.