I suspect the feedback you get here will be pretty solidly against your idea. The people here aren't even remotely representative of the general population when it comes to anything pizza. I think you will find that this is a pretty deep in the weeds, pizza R&D place with a fairly heavy bias against "pre" anything. Certainly there are exceptions, but I doubt a pizza kit is one of them. And rightly so, the focus here is on great not good. Good is easy. Great takes effort. If you stick around and read some posts, you will see that there are so many variables that even given the same ingredients and instructions, different people will make very different pizza with a very wide range of success or lack of. If you want to make great pizza at home you really have to experiment and tweak to figure out what works best in your own unique situation. If all you want to make is good pizza, there is no shortage of easy recipes on any one of who knows how many thousands of websites.
Personally, I don't think your idea is bad, but I do think the market for it is likely pretty small. But I'm as biased as anyone here. I'd encourage you to stick around; there is a lot to learn here that would help you fine tune your offering. However, if you want meaningful feedback about your idea as a business proposition, I'd look to forums with a more general cooking orientation.