"VMware tools version upgrade must be enabled." but why?

I'm digging into the vmware update process for the first time and discovered that the module for updating VMware Tools from vSphere 6.7 [has to be explicitly enabled](https://imgur.com/LiCzAjm) before you can use it.

Now I'm wondering why this function is disabled by default and if there are any cons to enabling it.

The only [documentation for this feature](https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.update_manager.doc/GUID-0B9FF31B-3702-4BD2-B925-9DAC98051338.html) I could find just says "VMware tools version upgrade must be enabled on first use." without giving any explanation of why there is an extra step here and what the effects of hitting "Enable" might be.

Can anyone offer any insight?