> It's virtually impossible to be a great cook at home; commercial cooking equipment puts out a lot more heat than consumer equipment and it does make a difference. Take a simple roasted chicken: what comes out of your home oven will not be the same as what comes out of a commercial oven.
You can create a great roast chicken at home. Very few dishes require a specialized oven or more than 450 degrees F.
The key difference between a home kitchen and a commercial kitchen is that in a commercial kitchen, you have more space, stocked ingredients, and more tools. And a bunch of apprentices to do stuff for you. You can cook everything at home that you can in a commercial kitchen, just less efficiently.
(I say this as a former professional chef...)