Simple answer is people ( a few ) are just jerks, but many here are more than happy to be helpful. But you are right completely, if you don't know the answer, or are to lazy or frustrated to give the same answer out again (that they have many times before), they should just keep quiet, but not all people have good manners.
Sent from my iPhone 7 plus using Tapatalk Pro
Sent from my iPhone 7 plus using Tapatalk Pro