That's probably true but I think this really speaks to the fact that many of us get all technical for lack of certain social skills. Like your comment's parent... The example he gave says a lot. On the one hand if you get what the person means even if they don't use the technically correct term all that really matters is that you both understand the intended meaning. On the other hand I think it's perfectly fine to nitpick at times. Those times would be if someone is very obviously ignorant of what a word means, especially if they use it wrong constantly.
But in the end I think being able to know when to pick those battles is a subtle social skill some people need to learn. It's really hard to explain. It's an interesting topic because it entails all the different ways humans communicate. It's not just words. It's tone, facial expression, volume, gestures, context, and even knowing a person's background or history can give you those subtle clues as to whether this is an ignorant person who needs to be corrected or if it's just an isolated fluke that still allows you to get the intended message and therefore requires no corrections from you.
Me? Well most of the time I think people get what I mean, dictionaries be damned and nitpicking a definition is a petty way to argue sometimes.