I don't get it because there is nothing to get.
No one is questioning that you find the differences between powers in 4e to small and thus feel samey to you. That's your feeling and you're more than entitled to it.
What's being questioned is what's your point? If you set the bar that low, why do you not set the bar that low for all D&D games? And, if pointing out differences doesn't actually matter, then well, you've basically created an unassailable position for yourself. That's rather convenient. Not only do you get to declare yourself right, but, you get to ignore any counter points.
How can you possibly claim that this is arguing in good faith if you refuse to accept any counter arguments?