The problematic thing is that the capital has the high ground in capitalism… Therefore it always tries to get those pesky rules removed by just threatening politicians through taking away jobs and industry to other countries with lesser worker rights for example.
Because right now we don’t have that much excess energy… Therefore it’s just a waste of energy to use it, because it is way less efficient. AND on top of it an hydrogen car also needs a battery just a smaller one. So it has all the downsides without any upsides. The only upside is that you can recharge your car faster and it has some more range. But both those things don’t matter for the average consumer