That quote wasn't directed at you.
I clarified the difference between 500 and 550. And you're 100% correct about the Allen head screws. Only the super original 550F I had kept the cross head screws.
Heck.... I find it easier to R&R the carbs for jet work vs. pulling the bowls, but that's just my preference.
I've even changed needle clip position with them in the bike. To me, I'd rather work on them on the bench.
And I've found that after any initial troubles, they NEVER have to come out again. Just use a good in-tank filter and non-ethanol gas or a staibilizer.