What dont people get about "Answers"?

I mean seriously, if someone asks a question and I know the answer to it but its not the answer you were hoping for why thumbs down my answer and award best answer to someone else who doesnt even answer the question, for example someone a minute ago kept getting blue screens after installing video card drivers, and no release of drivers were working, my response was that the video card was more then likely bad since all drivers are not working..i got thumbs down, while someone who said they were having the same problem got best answer.. thats not an answer to a question thats just saying you also havent fixed the issue! and this isnt the first time, why are people so quick to thumbs down because they dont like honest answers!?