Of course. I just don't see why.
Normally in RPGs the referee has three options when asked if the player can do something. Yes, no, and maybe. Maybe is the only response where the game mechanics come in. With both yes and no you skip the mechanics. Can I carry X, yes. Can I jump over the moon, yes. Neither refers to the game mechanics for that yes. Can I X, maybe...roll for it. To conflate the "always say yes" as detailed in the OP with "yes, but only if you roll for it" is to not actually engage with the topic.