It destroys a lot of the competitive advantage Toyota has. Toyota is very, very good at making mechanical components to very high precision & quality levels. They've built up this core competency by careful attention to detail over decades. It's one of the main reasons why people buy Toyotas.
With EVs, you remove many of the components that are required with ICE. Hence, it doesn't matter how good you are at making those components and sourcing them from suppliers. Hence, a random startup can do nearly as well as Toyota, with their billions in capital invested and decades of experience.
It's kind of a shame, though, since I'd love to have something with the reliability of a Toyota that also applies that reliability to the EV powertrain. Maybe one of their ex-employees will start something.