Porca in theory I agree with you but in practise it is not always that easy, for various reasons I imagine.
Yes ideally one ought to be able to cook for ones children;
you also should have a basic knowledge of first aid (hands up who doesn't)
you should be able to create exciting games and stories for them to enjoy...and introduce them to some form of culture, such as music, art etc
you should give them the right amount of freedom coupled with the right amount of protection
You should always be available to listen to them if they are worried or upset, and be prepared to act on these issues on their behalf
The list goes on. I tend to think that if one muddles through on most of these points, that's doing not too badly really.
I suspect that there are a lot of people who fall down on one or more.
No parent is perfect although most of us do try our best, whatever the difficulties involved.
If you love your children and are able to show it in some way, and don't damage them too badly in the process, I think that's the main thing.