Why do some people still think that Heath Ledger won the Oscar out of sympathy (two years after he ped on)?

All you Heath Ledger-haters/who thought he didn't deserve to win the Oscar, here's a question for you: Why do you think Heath won the Oscar out of sympathy?? His portrayal of The Joker was beyond flawless (the ONLY other actor who I could've imagined surping that performance would be Daniel Day-Lewis, that is how good he was). Yet, why is his Oscar win being looked upon as a sympathy win (even two years after he ped on), thus showing absolutely no respect for his work (or for him as a person)? Can you Ledger-haters/detractors do better than he did? Are you Ledger-haters/detractors some sort of elitist snobs who believe that actors who portray comic-book characters are not deserving of an Oscar (no matter how perfect or breath-taking their performances may be)? It's a known fact that Hollywood is a fake, plastic, and pretentious industry. But, winning the Oscar for Heath was a no-brainer. After all, Ledger-haters/detractors, TAKE NOTE: Heath Ledger, as The Joker in The Dark Knight, had won the Best Actor in a Supporting Role award at every Award Ceremony/Critics Society that exists in the universe. Prior to winning the Oscar, amongst Hollywood circles itself, he had won the Golden Globe, SAG Award, Critics' Choice Award and the BAFTA (till date, seven other actors have achieved the same feat). In fact, I believe that if he hadn't won the Oscar, the Academy members (who can be called all sorts of names, but I don't wan't to disgrace Heath's memory) should've publicly terminated the whole process of awarding the Oscars.