It depends on your risk profile, but there are definitely people who'd rather run their own PKI than permit threat actor reconnaissance by publishing internal hostnames to CT logs.
The overlap of people that suggest that you either run your own PKI or just distribute a wildcard certificate and have the technical understanding on how to do this in a secure way is minuscule. The rest of those people are probably better off using something like Lets Encrypt.
Also I wouldn't be surprised if Let's Encrypt/ZeroSSL were compromised.