So you're telling me..

[Akiudo]

If the SAM or the BLM contributes slightly more rDPS (read: enough to cover the gap a multiplicative raidbuff would give instead) then any job is competitive.

but if they provide more rdps at the top than the buff classes than they aren't "covering the gap" but instead actively exceeding the maximum potential even after multiplicative buffs, otherwise the top groups would still ditch samurai and go for the buff classes.

you are literally saying that its not just okay but necessary for a samurai to deal say 1% more than a "buff class" at the absolute top because no one would take a samurai over a "buff class" if these same buff class provided 1% more dps at the absolute top compared to samurai, by that logic no one would take any "buff" class over samurai aswell.

there will ALLWAYS be a best class, its literally 100% impossible to make every class equal. not even "equal" chess pieces truly hold equal value but are actually more/less valuable in different stages of the game.

all you're asking for is making Samurai every bit as mandatory as you claim say monk to be.