[DenisM]

I think it's pretty much spot-on.

People try to summarize their thoughts, but if they are not good at it the summary ends up being "We're pretty cool, not like those other non-cool people, and we stand for good things". And then, having arrived at that thought, they express it using the words they have heard before in similar circumstances.

And boom - pretentious mediocracy seasoned with hollow platitudes!

[dchichkov]

They might have arrived to this state of the page with meticulous A/B testing, optimizing for some function.

[pillefitz]

Maybe the initial guess was far off, so A/B testing led them to a pretty bad local optimum?

[dchichkov]

Who knows, could be a global optimum. Plausible theory could be - extreme frustration promotes memory formation ;) Or something ;)