It depends where you are. In the UK 43% of energy is now from renewables, and the proportion of electric cars continues to rise. For ICE motorcycles to continue, there needs to be a supply of fuel. While there are still plenty of cars, that supports petrol stations. As the number of cars starts to dwindle then the number of petrol stations will too. So, even though electric motorcycles are 'behind' electric cars because energy density is much more important, that doesn't mean that they will survive indefinitely.
But, like all even inevitable changes, things often take much longer than they should do. What we need is more global action on climate change, and other things, such as motorcycle racing, will follow.
Having said that, I have no problem with ICE engines running on renewable fuels. But, if that's not what the market becomes, then manufacturers aren't going to want to invest huge sums in it.