Well, while some of what OP says is true, there is even a larger number of just flat out homers that ignore everything and think the Spurs are the best. It's not bad to be a homer, it's part of sports, but for every person that may be a realist or even negative, there are far more homers that are the "I bleed Silver and Black holmes!!!!!!" types that basically support every move. Whenever the Spurs lose it's "fluky shots", whenever they win it's " le number 5 baybbbbbeeeeeeeee".
As with everything the answer lies somewhere in the middle. Spurs definitely have some fluky things happen and they aren't the worst team in the NBA when they lose and not the best when they win. The answer lies somewhere in-between always burning the tape when they lose and claiming "ZOMG you are an idiot if you don't think the Spurs will sweep their way to a 5th ring/OKC isn't even good I'll bet you $1000000000 the Spurs beat them in a series 4-1 max" type homers.