U233 weapon performance is poor, comparable to better conventional explosive weapons in the US and Russian military arsenal. It is also highly radioactive and hard to work with. These types of weapons would mean nuclear weapons no longer warrant the threat they used to as U235 or P239 is needed for powerful nuclear devices
Thorium based nuclear energy, even though in it's early stages, is a better alternative when considering weaponized nuclear power. Thorium appears to be able to be used for nuclear energy leaving a lesser mark for disposal and a safer creation process. Also, Thorium seems to be harder or nearly impossible to weaponize to make nuclear power a weapon.
Thorium does reduce the risk of bomb-making. The by products from Thorium are very difficult to make nuclear bombs out of. Other kinds of nuclear plant by products are vastly easier to make bombs from. Experts have made bombs from Thorium but stated that the materials were hard to handle and may detonate before desired.