Third, a lot of the reason we have spellings that don't seem phonetic is that early English scribes spelled things as they were (or similar to the original) in the source language, as a way of preserving history. For example, they could have written "chrome" as "krohm" or something but they opted to indicate the word came from Greek, with "ch". It's actually kind of a beautiful idea imo, trying to leave hints of heritage in the spelling. But yes I realize not everyone will care about that and will look at spelling as a utilitarian function alone.