yet another in a LONG list of examples of Larian ignoring 5e rules for pretty much no reason at all.
I wonder what is your reason to fight against it ...
Seems to me like there is none at all. O_o
BTW since you like rules so much ... have you ever heard about golden rule?
You know the one that says that anything that GM, DM, PJ (or w/e you wish to call it) allows IS the rule no matter what rules say.
Larian is GM here ... and they decided to allow this ... "allow" is most important word here since its only one of your options, therefore if you dislike their decision, fell free to pick any other option and be as RAW as a fruit salad.