At least part of it is that NASA is good at marketing. They make cool shit and hype up the public so we all know how cool it is too. Soon they'll be launching a NASA+ streaming service that's completely free. All their video and live content in one place. They're genuinely one of the coolest public entities I know about, and part of why I know about them is because they're so good at marketing their projects to the lay public.
At least on /r/europe on Reddit, I think because it was being launched by a European rocket from a European spaceport, so there was a lot of discussion about Arianne. The scope was extremely expensive, so rebuilding it probably wouldn't be an option, and Arianne 5 was a particularly reliable launch platform.
Amusingly, this new Euclid scope is the mirror opposite of JWST: a principally-European scope launched by an American rocket from an American spaceport.
I suspect that this was in the context of the James Webb Space Telescope launching and (a) having a complicated "unfolding" process and (b) being so far out that it couldn't be the target of a Hubble Telescope-style repair mission, so people are thinking about telescopes activating and maybe not working.
That’s a hell of a lot of money for a single telescope.
I mean, right here you can see telescopes being sold for $49.99 on Amazon. It makes one question the entire budgetary process behind this Euclid scope.
EDIT: Not to mention that the Amazon one comes with a tripod, and as best I can tell from this article and Wikipedia, the Euclid scope doesn't have anything of the sort. If we could get Josef Aschbacher here right now, I think that the no-tripod issue would definitely be an incisive question to raise with him.