It's the blanket statement I object to most.
Yes the title is a bit confrontational. And wrong :-) But I assume that was deliberate.
The gist of it is right, though: people spend way too much time optimizing stuff for hours that doesn't make even a minute of difference a year.
Followed by the idea that the short term hardware fix is economic in the long term.
That depends. But the OP might consider that once hardware is bought, it's not generally upgraded every year and a half to take advantage of Moor's law (even if that would be economical by itself), and that many servers these days are placed in rented spaces, which means you pay for the size of your server farm and its power consumption each month, not just once.