[tern]

I fear this is because "What-Is-Actually-Needed" is non-trivial to figure out. Related: "scratch your own itch", "bikeshedding", "yak shaving".

[alankay1]

Exactly -- this is why people are tempted to choose an increment, and will say "at least it's a little better" -- but if the threshold isn't actually reached, then it is the opposite of a little better, it's an illusion.