People who say they do it alone or want to do it alone don't mean that they don't want to do networking or sell to or buy from other people in the business they are about to get into, what they mean is that they don't want partnerships, and you should know that there is a difference between having customers or clients and having partners. You can't do any business without customers or clients but you can do any business without any partner if you are good at it and you can manage everything alone.
It wouldn't make any sense if someone says that they don't want to involve any people in their business but they want to earn money because that's not possible and it's illogical, I don't know how you came up with that or why you thought about this because I have never seen anyone having this sort of mindset.
For anything you do, there needs to another party involved in it, either for taking or giving, in a business, you buy from one party and sell to the other party, that is how businesses work, if you manufacture, that is even better because you will only need to involve one party that is the customers.
As someone who worked on a team before, I can tell you that people who do it alone are the smart ones. The reality is that if you are in a group setting, other people may not do as well as you do, and they may ruin the business that you work so hard on, which slowly you will realize and you will not do well too and in the end nobody will be making too much money at all and nobody would be working on the game.
I think it's clear that we are going to end up with something that will take a while, and we should probably consider that it is not going to be that easy to handle at all, we need to make this work one way or another, and for that to mean something we are going to end up with alone working, and doing it all by ourselves.
This would allow you to take responsibility of everyone, if you have some capital then you can hire workers, that way you won't have to do it all by yourself and if they do a terrible job then you are going to end up with some issues but at least you can fire them, when you have a partner you can't fire them so it would not make any sense, that's why it's smarter to get workers. But if you have no money, then do it yourself and that way you will not face any issues.