The value of the law is very specific. Conservatives in Texas don't want schools teaching very specific things.
1. Slavery was really terrible and white people did terrible things.
2. The earth is more than 10,000 years old.
I think those are the main two things, maybe I will think of more. The basic idea of the law is that when experts and scientists determine truth that is not compatible with their beliefs, they should get their side presented as equal. The goal is to keep the Bible on equal footing with science and history from secular sources, ditto science.
Similarly, FE wants to be considered equal or superior to basically the same people. The idea is to dismiss experts in favor of one's belief. Just like FE.
Don't you think it would be a huge step forward to have FE in public schools?
Imagine day one, chapter one: maps. The textbook would say "Here are several maps, none are actually right or have a scale, because no one has ever been able to make a map with constant scale and accurate directions and distances. Perhaps one of you kids can be inspired to finally draw the one true FE map."
Day 2 chapter 2, north star and sextant: Electromagnetic acceleration, it bends the light down to make the north star appear to be at angle equal to your latitude. Perhaps one of you kids will figure out what the TFES wiki says are "unknown forces with unknown equations" that the wiki "hopes" someone will figure out.