Everybody involved with the NASA manned space program seems to only care about their slice of The Budget nowadays, with actual mission requirements being a distant second priority. This results in a patchwork of bad design decisions and a weird mix of obsolete and yet-to-be developed technologies. This further results in endless delays and extremely low launch volume, which means you basically learn operations anew for every launch, and achieving anything resembling reliability becomes essentially impossible. Which brings us to this situation, where the Starliner was given the go-ahead out of budgetary desperation, despite having many known reliability problems. For a longer and more colorful version of this argument with sources, see [1].

[1]: https://idlewords.com/2024/5/the_lunacy_of_artemis.htm