I am completely disagree.
First of all shooting manually means exactly that: photographer choose parameters in order to get final result. Having light meter in camera is great. There is no other way in setting correct exposure then using measurements. Guessing is not very welcome way.

I think that your question is not correct. Camera is tool. It has built in options.
For me better question would be if camera owner knows and understand all camera possibilities and power as well weakness.

It is not strange that many people don't understand 90% of their camera functions and settings. That is why many cameras have "Auto" , "Inteligent Auto" or similar set point, and that will help people to take beautiful photos , almost as good as those taken by phone.