Aside from it being code you don’t want on your machine

Code you don’t want on your machine, that have sometimes more permissions than you yourself have on your own files, is completely opaque, and have the legitimacy to keep constant outgoing network data that you can’t audit.

Yes, aside for that, no reason at all. No problem with a huge risk on your privacy for moderate results that don’t particularly benefit you in the long run.

(and all that is assuming that they’re not nefarious to begin with, which is almost impossible to prove)