EDIT: you guys have dug up some truly horrible pisstakes :D Thank you for those.
To the serious folk - relax a little. This is Mildly Infuriating, not I'm dying if this doesn't stop. As a non-native speaker I was taught a certain way to use the language. The rules were not written down by me, nor the teachers - it was done by the native folk. Peace!
English definitely has rules.
It’s why you can’t say something like “girl the will boy the paid” to mean “the boy is paying the girl” and have people understand you.
Less vs fewer, though, isn’t really a rule. It’s more an 18th century style guideline some people took too seriously.