I do not see anything strange. A man had an idea how to make a perfect coin. He realized his thoughts in a smart contract and posted a contract on the ethereum blockchain. What is the need for a development team here

In this project, one person is enough, in fact, he completely expressed his idea, all that remains is to follow everything

But how one person can do all the work about the project if there are so many different stages to do. I think that its really difficult task for one person