Because they are arguing from being smart in a different field and experience with things that are several orders of magnitude off the scale of what they're dea

Because they are arguing from being smart in a different field and experience with things that are several orders of magnitude off the scale of what they're dealing with. Things that work on a laptop with the dev server don't work at scale, and you won't even understand the problems till you've had some theory/experience with the problems that scale adds.