Given as well the fact that this is Baldur's Gate 3, the only point of reference that's relevant is the previous titles.

BG2, level 40 cap, literally become a demigod with megapowers.

This has nothing at all to do with PnP, in fact isn't the other reason given against higher levels the fact that 'PnP campaigns never even go that high'?

Then people also want to claim 'PnP is fun cos high levels, that's not possible to do in video games'.

The arguments against higher level caps in a video game, especially considering what BG2 already did 20 years ago are just absurd.

Being stuck at level 12 throughout act 3 when you can in fact reach that cap before you even reach Baldur's Gate, like why does Act 3 even exist if acts 1 and 2 are already levels 1-12?

Also regarding 'high level spells are just too powerful' ... Deconstruct is a level 6 spell that if it was featured in this game would trivialize Act 3 by simply being able to destroy all the Golems plus all the level 6 slot recharge items. Balance is not hindered at all by level cap or spell levels, the most obvious point is you also make the content to support that cap, Act 3 already and if it also had the upper city added could easily support up to level 16 content.