Toyota has mastered precision replicable production of internal combustion engines and related components.
This has been Toyota's perpetual money tree. I'm sure the reward systems inside Toyota management favor those who improve it and protect it.
I'm sure at first they laughed at these pipsqueak EV guys with software backgrounds.
Toyota engineers who propose and work on alternative fuels, like ammonia, are probably not laughed out of the room - which is also full of other career internal combustion engineers.