Yeah, these projects done by one or two people could be better with a larger team, but it's definitely not a matter of hiring a big pile of people suddenly.
The ideal size is probably a couple dozen people, but scaling up to even that will take months since the one person currently in charge has to do a lot. And it'll almost fully pause work on the project for a while.
Cause if there's one person, they've got to find all the candidates, do all the hiring, then bring people up to speed.
The real problem is if the person who made it doesn't have the skills to manage even a small group of people.
You probably had the same damn book I did, with an illustration of him eating an orange and seeing the wings of a butterfly coming up over it and supposedly realizing they look just like the sails of a ship and so, gasp, the world must be round like this orange!