Even if it sounds impersonal and lazy, this is just called being polite, most people still prefer an answer of this kind to "lol no, sorry, you suck". And that's why we do it aswell. Perhaps we should work more on make it seem less impersonal, but the message is clear and loud in any case.
There's politeness--with which I've only seen Gell-Mann flirt--but then there's the sticky-sweet bullshit the OP was parodying.
(He's wrong though, and I'm still working on it :)
I believe the correct expression is "grab coffee".
I have my ego pretty much under control, exagerated compliments won't do any damage here.
VC boilerplate is etiquette, which means formalized behavior designed to reduce conflict, but also at the expense of communication. It's not really about politeness, so much as being noncommital both ways.