From my understanding, the West never truly committed to that goal. It just said so as a PR thing, so that the much more affected countries quiet down, because "hey hey we said 1.5°". "Oops, sorry, we tried".

The West knows that it will manage even with more than that, but it also knows that not everyone will.

Jury's still out on whether the neglect is just due to apathy or because it might be beneficial. Only time will tell.