I absolutely love DE but I agree the trailer is a bit misleading and dialogue isn't typically about the case. That said some of the best writing I have seen in a game full stop.
I also died immediately though on my first attempted "playthrough". Damn you tie....
An alternative way to view this: if I order three sodas at a fancy restaurant vs three top shelf alcohols, the service is functionally the same but the bill is wildly different. Would you still say I should tip on pure percentage in the latter scenario?