Where would that kind of thinking lead us..? Most medical procedures are too complex for someone untrained to understand. Does that mean clinics should just not offer those procedures anymore, or should they rather make sure to train their physicians appropriately so they’re able to… do their job properly?
Even if your server admins fully understand TLS, there are still issues like clock skew on clients breaking things, old cipher suites needing to be reviewed / sunset, users clicking past certificate warnings despite training, and the list of (sometimes questionable) globally trusted CAs that the security of the Internet depends upon.
Of course they should do their job properly, but I'm skeptical that we (as software developers) can't come up with something that can more reliably work well.
And not even at the "math" level. I mean, like, how to get them into a Java keystore. Or how to get Apache or nginx to use them. That you need to include the intermediate certificate. How to get multiple SANs instead of a wildcard certificate. How to use certbot (with HTTP requests or DNS verification). How to get your client to trust a custom CA. How to troubleshoot what's wrong from a client.
I think the most rational takeaway is just that it's too difficult for a typical IT guy to understand, and most SMBs that aren't in tech don't have anyone more knowledgeable on staff.