It's also possible that people are getting praise for these sorts of "negative accomplishments" in private, or on performance reviews. Which is better than nothing, but I think it's still valuable and healthy to remind people that part of the job isn't just building stuff, it's also making sure the right things get built. And public praise for killing bad things is a good way to do that.
So someone responds by assuming it's a negative: "...applaud an underling who usefully twisted the knife". I mean maybe, but quite possibly maybe not. But some people seem wired to find the worst.
This article from three days ago: “'Stress, burnout, churn, and a cut-throat atmosphere': An internal Amazon study slams the company's culture.”
https://www.businessinsider.com/amazon-earths-best-employer-...
A few years ago I saw a promotion announcement e-mail come into my inbox for a colleague who sat a few steps from my desk. It was filled with the usual "did this, did that, made an impact, etc." statements but it also had a large section dedicated to the analysis this employee performed and presented to kill a huge initiative before the organization rolled it out. The initiative was very innovative but it ultimately wouldn't have achieved its goals. It was encouraging to see this in a promotion announcement and indicated to me that some organizations do explicitly reward for preventing bad things.
This was at AWS.