IME quite a lot of poor tech decisions come down to techies being too dogmatic in their beliefs[1].

Move to AWS? All techies want to add that to their CV so sure why not... Who cares if it's the best decision as long as the CVs get improved.

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[1] My personal bugbear are techies who are adamant that nothing but google chrome can be used by the regardless of the fact that when pressed they can't find a single site that doesn't work on FF. Usually the goalposts are moved at some point in the discussion from "sites don't work on FF" to performance even though FF with uBlock origin cuts actual downloading of ads to zero compared to the uBlock lite on chrome. They'll next complain about memory used in FF compared to google regardless of the lack of any measurements and even though these same techies are using bloated electron apps daily anyway!

As you can tell, this really is a personal bugbear of mine.