One major argument for consoles is still that there is a single unified platform that gives better bang-for-buck than PC of the same price, and that studios can dev and optimize their games on more easily.
That is not how their business model works. The consoles themselves are sold almost at cost of production or at a loss. The money for Microsoft, Nintendo, Microsoft comes from those exclusives and live service subscriptions. They want to maximize the amount of their hardware in homes and then make the money on selling the thing that actually makes them useful.
They can’t. It’s too sweet of a deal when there is an already existing fanbase ready to give them their money for much less work and risk than building a totally new game.