Hello,
It's not a problem, I would say the opposite, if there were non "verified" HOSTS listed on that page, then you would have problems.
From the documentation:
"You can configure vCenter Server to check the SSL certificates of hosts to which it connects. If you configure this setting, vCenter Server and the vSphere Client check for valid SSL certificates before connecting to a host for operations such as adding a host or making a remote console connection to a virtual machine. Starting with vCenter Server 6.0, SSL certificates are signed by VMware Certificate Authority by default. You can instead use certificates from a third-party CA. Thumbprint mode is supported only for legacy hosts".
Regards,
Ferdinando