Nuclear plants take decades to build and require a good power grid to distribute power to remote regions. Even longer if you want one of the safer types like Thorium, since you also need to wait for someone to work out how to build and run them at scale. This is kind of important if you are interested in making money now, rather than that getting money from investors in exchange for the promise of profits in 20 years time. Oh, and a lot of people also think climate change should be tackled now rather than in a decade or two.

Solar and wind you can start building straight away and can build small local plants that don't rely on long distance links of sufficient quality and reliability.

Hydrogen is trickier since you still need solar or wind and a production facility to make it and logistics to distribute it. Hydrogen seems a side show at the moment, since lots of people seem interested in generating Green hydrogen it but I don't see anyone actually wanting to make use of it. Maybe it is a good way of getting governments to kick in money.