We've all encountered things that are technically correct but still very annoying. Like when someone points out that there's a difference between a blanket and a duvet. Or that in France, perfume is a fragrance for both men and women, as is cologne — it just depends on the time of day you're wearing it. Or when someone calls a watch a "timepiece."
All of these people are technically correct, but they're still going to frustrate the ever-loving heck out of someone who just wants to be warm for the night, or buy some perfume for an evening out, or is curious to know where you got your watch.
"Oh, this timepiece? Let me think..."