For many people who spend their time writing, the issue of descriptivism versus prescriptivism is a fascinating one. Are there rules of grammar and usage that people should follow? Sure. But are those rules defined by an elite group of language speakers and writers? Or should they simply be based on regularities of language usage by all speakers and writers? A fascinating question, with all types of issues.
For what it is worth, my view is basically that at any one time (within a group of language users), there are rules that define proper usage. But those rules change over time. At a certain point, the old conventions will give way to new ones, and those new ones will become the proper usages. So one day, perhaps pretty soon, the distinction between imply and infer is likely to evaporate and it will be proper to use them interchangeably.
Even if one is a descriptivist and agrees with that prediction, I think that one should be sad about the demise of the distinction. When the distinction is no longer recognized, it will be harder to convey precise information about whether the speaker is implying or the hearer is inferring. Perhaps in the new world new words will allow a speaker to convey the distinction, but there is no certainty and it seems like a lot of trouble to reinvent the wheel.