Originally Posted by k0nr4d

There are plenty of reasons to need cpanel access when installing a script or site...We need access to cpanel or whm probably 9 out of 10 times that cpanel is installed on a server in order to install some missing dependencies, create a database, reconfigure something in php, install some missing php module, etc. Not everything that is misconfigured on a server is initially visible using just http to access a script. Sometimes even managed hosts hire techs that can't do anything more then basic cpanel or plesk operation.

That being said, it's more of a customer service thing so someone gets up and running faster and doesn't have to do a week of back and forth with configuration/dependencies. If someone refuses to give that access, no problem - it can be done the long way too.