Might be a bit of a wording thing, because I think I got it very differently than you.
To me, that sounds like "you can't design for a higher cognitive load than what your team can absorb" - and not "try to optimize the cognitive load dor the maximum your team can absorb".
To me, that sounds like "you can't design for a higher cognitive load than what your team can absorb" - and not "try to optimize the cognitive load dor the maximum your team can absorb".