The purpose of faithless electors isn't to stop the appointment of arbitrary candidates based on personal preference, it's to stop the appointment of people who are completely unfit for the position. It absolutely makes sense that it would only be justifiable to exercise that option on certain individuals. An individual who blatantly and repeatedly lies about election results and encourages their supporters to commit voter fraud in an attempt to retain power seems like the exact type of person you might want to stop from having that power in the first place.
This was a crowd of thousands of people, many armed, attempting to interfere with the actual process of counting the votes of those electors. More than a couple members of the crowd had zip ties, which can only be reasonably explained as hostage taking paraphernalia. A literal gallows was erected, and members of the crowd were chanting for violence against Pence and Pelosi (the next two after Trump in the order of succession). A couple IEDs were found on the premise. A police officer was beaten to death. If security hadn't managed to evacuate congress and the VP before the crowd got to them, it seems likely that there would have been deaths among them.
Treating those two things as equivalent is absurd.
I honestly have no political axe to grind here, but I distinctly remember how 4 years ago it was a legitimate talking point on the losing side that 'faithless electors' (or 'Hamilton electors') should step up to deny Trump the presidency ([1], [2]). Michael Moore offered to pay the resulting fines for any Republican faithless electors [3].
To me as an outside observer those seemed like attempts to overturn a fair democratic election and install an illegitimate government. However, neither the politics subreddit nor Michael Moore have been deplatformed. So I'm not sure the criterion you mentioned is entirely correct.
[1] https://old.reddit.com/r/politics/comments/5gpmru/first_repu...
[2] https://www.theatlantic.com/politics/archive/2016/11/meet-th...
[3] https://abcnews.go.com/Politics/michael-moore-appeals-gop-el...