They do mention it, but it’s downplayed relative to how much of a problem it can be.

In a situation where you have a lot of energy generation that would go to waste, storing it in a system with low round trip efficiency could be better than losing it.

For planned installations where the generation cost is nontrivial (like a solar install) then increasing the generation to compensate for poor battery efficiency isn’t as easy of a decision.

Yeah, when baseline efficiency is zero then there's probably room for improvement.