I think it speaks poorly of their manager's professionalism, and what sort of behavior they consider to be acceptable with regard to colleagues.
If you clean it up, you're taking responsibility for it that might not be yours to take, and in an organization with many managers, that can permanently wreck your chances for advancement if those above you perceived your involvement as intruding on their territory, or trying to make them look bad, or trying to make the culprit look bad, and so on, and so forth.
Rarely is it "wow, there was a problem and they fixed it, without even being asked!"
Organizations that are rational and have good management let people take responsibility like that, and it's a good thing. Most organizations are not like that, and the bigger they get, the more likely it is you'll have an adversarial, territorial, hyper-political environment with saccharine smiles and backstabbing, and doing anything that even hints at negatively framing a manager, even just in their own minds, is sufficient reason to make it not your problem.
If you have good reasons to fix it, or if it's your problem for reasons that make management look good, you have the opportunity to fix an issue and be appreciated for it. Otherwise, it's just not worth jumping on other teams' grenades.
It'd be nice if everyone was rational and competent and secure and anti-fragile, but humans kinda suck in groups.
I’ve seen people who played the game well at Google or Amazon fall completely flat on their ass at a different company, thinking the game hasn’t changed (or that there even is a game), barely lasting a few months on the C suite before being softly moved along.
When the game rules shift, those people flail. Recent example was that in 2021-2 nobody could hire fast enough, but now staff expansion is not common. Managers who excelled at coming up with reasons to spawn new teams did great until the money dried up. Some of them shifted gears and adapted, but others just couldn't get the message.