“bend it” is an advice I once got by a woodtech on my personal riving knife alignment and it was actually enough- as in it needs to be in a straight line with the blade and the height exactly same as the blade too - 2022 slms rule on riving knive was: it has to be higher than the blade…
… so you cannot make grooves and have to use spindle molder instead, others think it should be lower so you can make grooves on tablesaw.
All valid H&S points as the lack of height on riving knive can allow people experiment with making bowls on table saw which is wild , but if youre not an adrenaline junkie you can easily use riving knife lower if conventional woodwork is all you are doing (as in a couple of passes to get though a piece of wood or just grooving). It is all matter of culture and general level of skill, which is being assessed by woodtechs seeing who they are inducting.
Personally I always opt in for higher safety option whilst being able to use the tool for the job.