I agree with this completely. I hate this “It's not real Star Trek!” bullshit that often comes up. It's the other side of that coin I was talking about, I feel. The side that is saying “I don't like this so it's not the real Star Trek” is just as wrong as the side that's practically saying “It's unfair to criticise things about Discovery that the other shows did as well”.I think it's less about giving DISCO (or the reboot movies) a free pass than about applying a double standard to the new stuff, particularly in the context of somebody insisting adamantly that some particular thing "proves" that DISCO is not canon, not "real" STAR TREK, an insult to all true fans and Roddenberry's sacred memory, total trash, etc., even though the earlier shows got away with the same thing.
I don't think anyone is saying that DISCO can't be criticized just because "Spock's Brain" exists. It more that you can't say "DISCO isn't real STAR TREK!!!" for doing something that the other shows also did.
Just look at @fireproof78's post above: He's saying “The most recent example to my mind is the negative comment that DSC didn't comment on Connelley's death but other Trek's did the same, sometimes with a laugh track out, and that's unremarkable.”
To my mind it's a valid criticism to say someone feels Discovery should have dealt more seriously with Connelley's death. I don't get why you have to bring the other shows' failings into this (other than to try and invalidate that point of criticism). I don't think anyone said “They should have dealt more seriously with Connelley's death, just as previous Trek did. So this is not real Trek.” Did anyone say this?