If you meant the RasPis, there are off-the-shelf cooling solutions you can use. Otherwise, I don’t see any mini PC.
I’ve also seen NUCs and Mac Minis in rack setups and they’d have fans, either integrated in the units, or in the rack fittings.
Last but not least, mini PCs don’t even generate that much heat, unless you’re overclocking the crap out of it.
I think you should follow your heart and not some stranger on the internet.
No, I wouldn’t say you’re the asshole, whatever you decide.