The reality is they’re a fairly small automaker and 99% of their current sales are IC cars. They believe they will do more for the environment to keep spending a large portion of their R&D budget getting gains out of their existing cars than completely pivoting to something people aren’t currently buying. In the meantime, a lot of the fundamental issues with EV cars will iron themselves out.
Westerners want results tomorrows but the Japanese will take incremental steps that maximize the chance of success over an incredibly long time horizon. Very different mindsets.