Unless one chooses the round, powder and pill to prevent double or over-charging, I heartily agree with you on the single-stage press.
If we’re talking about something like 9mm and the right powder, you can basically fill the case to the mouth, use a steel rule to wipe the excess off the top and stuff a pill on it.
But the older rounds like .45 Colt, .45 ACP, .38, etc... I like to inspect and observe every last one of those, every time.
Funny thing.
Those glocks I saw go pop were 9mm