Why?
Why are people upset about being told about non-obvious potentially painful aspects of a product... simply because the person telling them about it was smart enough not to experience the pain first hand?
If I warn you that the stove is hot and will burn you if you lick it... do you really care how I know? Are you going to complain that because I didn't lick the stove and find out first hand just how much it burns that I should STFU and stop telling you that it'll hurt when you do it?
That just seems like a really silly attitude to me.