And they are even harder to get to go than DT by huge bunches, unless you believe in the low-energy a-neutronic fusion scam - aka cold fusion in which case you are on an LSD overdose.
Several companies have a-neutronic reactor designs under research and not a "cold fusion" design amongst'em.
And NASA's Glenn Research Center and the Navy's SPAWAR laboratory both think "cold fusion" (aka LENR) is real and have presented peer-reviewed papers saying so.