Ever heard of the "broken window" theory? Ever heard of entropy? Ever read the history of any cultural aspect, from poetry to jazz, to teaching,
Yes, some things, those that are vulnerable, need protection. The Bengal tiger needs protection. The tribal languages in the Amazon need protection. English is in no way vulnerable, so it really doesn't need any protection.
On the other hand, maybe you need to read the history of how English evolved into what it is today. It certainly isn't because of prescriptivist nonsense like "protect[ing]" the language from "decay and dilution".
to coding?
Funny you mention that -- one programming language that's been "protect[ed]" from "decay and dilution" a lot is Java, and look what a boring, unimaginative cesspool that's become.