I think the reasons are completely pragmatic and boil down to two things.
The first is that rigorous systems usually take longer to build and meanwhile the slop ships first and gains mindshare.
The second is that rigorous systems are usually built by academics or specialists in some specific vertical and lack the easy installation, easy onboarding, and integration with other platforms that more pragmatic sloppy platforms tend to prioritize first. Those things get prioritized first because sloppy languages and systems tend to evolve from makeshift "shop jigs" used to get stuff done, not from research.