I've yet to hear an argument for why the needs of professional linguists should take priority. If you don't standardize the language, then it evolves to become unpredictable, inconsistent and impossible for non-natives to learn without years of immersion.
The language you prefer is also exclusionary. Imagine if Ivy League universities used a complex idiosyncratic dialect that was opaque to anyone who didn't grow up in an upper-middle class New England suburb. It would create a barrier for outsiders to gain access to those colleges, and a lot of other elite institutions. Standardizing and simplifying rules eliminates that barrier, allows the language to be taught to people who would be otherwise marked as outsiders.
The language you prefer is also exclusionary. Imagine if Ivy League universities used a complex idiosyncratic dialect that was opaque to anyone who didn't grow up in an upper-middle class New England suburb. It would create a barrier for outsiders to gain access to those colleges, and a lot of other elite institutions. Standardizing and simplifying rules eliminates that barrier, allows the language to be taught to people who would be otherwise marked as outsiders.