This seems to me like a comment driven by jealousy. Simply because it doesn't add any reason to it, like for example: a discussion or at least a comment about how the capital invested in fusion is needed somewhere else.
Sorry if it sounded flippant. The point I wanted to make, and which was not clear from the comment above without opening the link, was that this statement comes from someone with a clear conflict of interest.
I think the burden of proof should be on the scientist, it just doesn't seem plausible to me that fusion progress is so fungible, especially not at timescales less than what it takes to train a fusion researcher.