> A lot of programmers, in contrast, couldn't care less.

You really think the problem is the programmers?

Here's a homework assignment for you: approach the product managers in any given software company and pitch a new development practice, which will improve UX through superior performance, reduce AWS bills, and save the planet, all for the small cost of doubling all product release timelines. Then come back here and report their response.

Just try not to take it personally when they laugh you out of the room.