I agree totally, and I have suggested this before. Imagine if the 10 bn dollars were invested in 100 different fusion ideas, and trust me, there are at least 100 patented ideas on fusion, some more stupid than others. A lot would be learned and the odds would be better.
Further, if all these different approaches to fusion were done under one roof, a lot of duplication could be avoided. The vacuum systems and the measuring equipment is almost identical in all cases.