Back in they day, the razor makers were, IMO cranking out razors that may have cost $1, probebly quik and dirty work.
Punching a wierd shaped hole was maybe the norm,nobody cared.
But today we have the abilitys to make a perfect hole for a round pin,is only sound mechanics.
Doing a resto on a fine blade without sound mechanics (the proper pin and pivot hole, properly sized) is just plain wrong JMO
And then another school of thought! Anyway, they cannot be seen, once pinned. I have had no issues leaving them alone.
After bushing lots and then not, I really see no difference. Seems bushing for the sake of....er....Bushing! JMO