Language devolves just as it evolves. We (the grand we) regularly introduce ambiguity --words and meanings with no useful purpose, or that are worse than useless.
I'm not really weighing in on the appropriateness of the use "grok" in this case. It's just a pet peeve of mine that people bring out "language evolves" as an excuse for why any arbitrary change is natural and therefore acceptable and we should go with the flow. Some changes are strictly bad ones.
A go-to example is when "literally" no longer means "literally", but its opposite, or nothing at all. We don't have a replacement word, so now in some contexts people have to explain that they "literally mean literally".