True, but that's one of those "baked in" things you kind of have to just take for granted in order to have a conversation with someone about recording stuff online most of the time
Kind of like "well of course it sounds bad if you can't play" - I mean no shit sherlock

But you have to assume someone is a basically competent player for their experiences and opinions to have any validity in the first place.
Not that either one doesn't happen; we have certainly have seen both in the annals of RT history.
I just sincerely doubt the half dozen people who have posted their bad experiences with a 421 were using it correctly judging by how they described it - some of them whom I
know are decent players and have recorded solid tones in the past.