Leaving pointless answers/reviews on websites

I'm not sure if this is just me, but it drives me nuts when I see someone answer a question (for example in the questions section on an amazon product page) to just say that they don't know or they give an unrelated answer.

For example:

Q: Do these headphones support bluetooth and wired connections?

A: I'm not sure, but my grandson loves these!

The same goes for posts which ask a question on other sites or reviews complaining about a product, despite it doing exactly as advertised. Idk, maybe I should have posted this on unpopular opinion.