Well, you're probably right, but for something as simple as email they market themselves as a total package. All I should have to do is configure the email account in cPanel, plug the info into Outlook, and connect. That is all I've ever had to do before, so why would cPanel change it now?Well... cPanel is just a tool.
Now, you can argue that cPanel has marketed itself as some magic tool that automatically does everything you ever need - I might join you in that argument. But in the end it's just a tool.
With ANYTHING that is on the Internet there is no such thing as a "install this and leave it and never have to worry about it ever again!" Has cPanel and other control panels peddled themselves as such? Maybe. But it's a marketing scheme - it doesn't make it true.