I live in world where I can write the MVP to prove a business case in a week after / before work, sometimes with no code!
Edit: My MVPs may not meet your requirements for new software. They will not be all singing, all dancing. They will do some tiny slice of core functionality that allows me to prove the value of technologies application to the problem. Often with serious manual intevention.
I struggled to answer this without derogatory sarcasm.
I agree, an MVP is not a business. I would not expect that a business would be built in a few weeks or even months. My personal experience with businesses is that they take years.
But we're not talking about building a business. You do not launch an MVP and call it a business.
I was specifically talking about proving a business case for a solution that could turn into a business. This is precisely what the things we call 'MVPs' are mean't to be for.
I don't know what world you live in, but in mine, new software takes a lot of time to write, or a lot of money to pay someone to write it.