Indeed, everybody should learn how to cook. The basics at the very least!
Otherwise how can you be really independent?
Parents should be teaching basic cooking skills, sure, and also washing your clothes, and operating appliances in general, and changing a light bulb and fixing a broken pipe, and keeping within budget, and being a polite person, and many other things.
But school should provide that sort of knowledge for those whose parents don't!
When my parents were kids there was a subject of the kind, but it was extremely sexist: guys learned the fixing and girls the homemaking.
Some parents are over-supportive, I guess that's the case with yours.
They think you are great, and because they want you to realize it they'd rather overdo their praises than express anything that might sound slightly discouraging.
But in my opinion this may backfire: If you realize there is still so much room to improvement, you simply start to disregard the opinion of the people saying "it's great", you start to think they don't know any better.
And at that point instead of being encouraging it may work the opposite effect...
I try to convince my son that what's important is making the effort, that the path is what matters.
But it's quite hard, most society focuses on achievements, on goals. And I fall to it sometimes too.
Being a parent is kinda hard, we all do our best.