If every character build and team comp can beat the game then what's the point of having those customization options in the first place?

>>713908023 (OP)
the devs can of course calculate maximum damage and 'perfect' gameplay, but humans are far from perfect, having reflexive idiosyncrasies and internal rhythms, so allowing the player to experiment within his/her own limitations is desirable.

Remember, each year, a new generation of players is born; not everyone's been a Souls player for the last 10 years. We must all learn and adapt and grow.

Why are there video games with more than one weapon when any of them can eventually do enough damage to kill anything in the game?

Variety.