I think you're giving a really poor and ungenerous reading of others' arguments. First of all, who said it's rocket science? Obviously it's not rocket science. It's not even Honors Biology. And it's funny you should accuse others of being thick, because I don't think you understand at all the point luckiestman was making, which is that the "talk" of the people you reference - on this board and elsewhere - is impatient and ungrateful, and you're just proving it. Rooting for this team for the last six years has been a blast for most of us, even if you're miserable, and right now there is no denying they are the best team in the NBA.
Secondly, it's dishonest to pretend like "years in the NBA" is the only relevant measure of time. Bird was 24 when he first won an NBA finals. Tatum was a baby when he came into the league, whereas Bird had plenty of seasoning in college, and now Tatum is - guess what - 24, and already in the conversation as one of best players in the league in the best team in the NBA, the finals favorite for years to come so long as they keep the band together. He's gone to the finals once and the Eastern conference finals two others times outside of that, and in an era where there's more parity and talent than ever. Last year he lost to one of the best players and teams of all time, while having a bum shoulder and several hobbled teammates.
Of course there's talk. There's always talk in Boston. That doesn't mean it's anything but silly, impatient drivel.