Thanks for clarifying. I took a look as well, and the very first reply confirms your opinion and that of the GP's parent. Plenty of downvotes and comments that come after criticizing the maintainers, "I am not sure how @rust-lang/libs-api can look at 5400 regressions and say "eh, that's fine"."
You are sincere. I believe this is not a cover-up but more of a misunderstanding. Think this way: many people coming to that github thread don't know who are core rust devs but they can clearly see the second commenter is involved. That comment denied this being a major issue and concluded the decision was made as a team. To the public and perhaps some kernel devs, this may be interpreted as the official attitude.
Not sure why people are trying to cover this up.