Rare point of disagreement. 5th edition is popular for many reasons and one of the reasons is that critical role has show us how fun a tabletop game can be.
Sure. I just don't see how that has anything to do with what I said?
The point is that you can play your tabletop sessions however you like.
Because if that point had any merit, then so it would the opposite one "4 players is considered the default party size for tabletop D&D".
Except both are irrelevant. The argument for a six men party is that it works better for a videogame (for reasons we have already argued like half million times at this point), not that "Most tabletop players do it".
P.S. My second argument for a six-men party is that allowing one would also force Larian to acknowledge that their control scheme is absolute trash tier and NEEDS to be changed, anyway.