Well, for one thing, people learn differently and comparing a "standard" test result just measures how much crap someone has been able to cram into their brain. I compare it to people memorizing trivia for Jeopardy. Instead what needs to be tested and taught is critical thinking. Yes a general idea of history and others is important, but again its teaching people to think about those subject, not just memorizing a bunch of dates that will be forgotten the day after the test.
you cannot possibly do any higher level of analysis of any subject if you dont even know the base facts. its the equivalent of saying you dont need to know your times tables to do physics. Like, theoretically its possible to look up 4x6 every time you need to do arithmetic but why would you not just memorize it.
If you dont even know that the american civil war ended in 1865 how could you do any meaningful analysis on its downstream implications or causes and its relationship to other events.
More important than knowing what 4x6 is, is understanding what multiplication is, why division is really the same operation, understanding commutative, associative, distributive properties of operations, etc. All of this comes as a result of repeated drilling of multiplication problem sets. Once this has been assimilated, you can move on to more abstract concepts that build on that foundation, and at that point sure you can use a calculator to work out the product of two integers as a convenience.
That's an argument against ranking students in a way which can potentially determine their entire lives, not an argument against standardized testing. The alternative to standardized testing is GPA which is an extremely subjective metric masquerading as some objective datapoint. Kids from different schools don't even have the same curricula let alone the same grading standards.
Also the teachers have a vested interest in giving the highest grades they can to as many students as they can without making it obvious that they aren't actually grading them fairly. i don't mean this as an accusation against anybody or some sort of insult against teachers as a whole, I merely mean to point out that this is what they are incentized to do by virtue of the fact that they are indirectly grading themselves by grading their students.
