I have yet to read an article or paper which has convinced me that energy generating fusion is possible at low costs and with materials that we currently know of. I don't see why anyone (including governments) should invest in these types of projects. Not only is the science extremely complex, the implementation is a huge engineering challenge. We already have a huge fusion power plant at the heart of our solar system and we can harness its power with some pretty cheap solar panels.
If you want to read a better article explaining the science then try http://fusionandthings.eu/2019/06/05/new-calculations-show-p...