I don't understand the premise of your objection. The point of the comparison is that tech is uniquely unbalanced among the professions. I'm also disinclined to try to rebut an argument that seesaws like yours now is --- first the comparison is so idiosyncratic that it must be biased, then so broad as to be meaningless. If you object to the classification of labor as "cognitive" or "manual" and "routine" or "nonroutine", you should probably take that argument up with r/badeconomics.