I see a parallel between this and the pushback against Electron, and the counter-argument is the same: more choices in software in general is a good thing, and

I see a parallel between this and the pushback against Electron, and the counter-argument is the same: more choices in software in general is a good thing, and lowering the cost of entry by dropping requirements in accessibility or performance (Electron) gets society more choices in software. The hypothetical csv-cruncher behaves a lot like a compiler - imagine if we had to make every one of those compatible with screenreaders and 20-year-old hardware running obsolete OSes. Imagine how much shittier everything would be with this additional burden to carry, then multiply it by every component in a typical software stack. This is the cost. It is finite, because everything is finite, but that doesn't stop it from being very large. So to sum up: regulating this is detrimental to society.