People tend to exaggerate things. It seems to be the fashionable way to speak. One thing that I've noticed, is that people generally exaggerate about things they have no experience about.
I've heard quite a few people say 'I'm blind without my glasses' or something similar, myself included. None of us have any idea what it's like to be blind, and I don't think any of us know anyone that is legally blind. I don't. Comparing a little bit of blurriness to being legally blind is quite the exaggeration.
I've recently been trying not to exaggerate things because you never know who will hear you and react in a negative way to what you say. Exaggerations are often negative, and while they may not seem harmful for for, that negativity may harm someone else.
The reason I've realised this will require a bit of back story. Since I've started getting frequent migraines, I react in weird ways to phrases that before were completely harmless and even part of normal conversation. For example, the first time someone told me they had the 'worst headache ever' I stared at them for a short while. It was a perfectly common exaggeration that would have earned them sympathy if it wasn't me that they complained to. And the shock I felt at hearing it surprised me. Since then I've been trying not to exaggerate things, because apart from the effect it may have on people around me, exaggerating breeds negativity and I don't need that in my life.