This seems like a great strategy for Samsung. Fabs in Taiwan and South Korea have the same issue. If a conflict arises between China and any western nation (including Australia and New Zeeland) the fabs near China will most likely be shut down or severely damaged. This current weakness actually makes conflict with China and North Korea more likely. By moving significant production to the US, they have a stable area to operate their fabs for decades and the chances of the Chinese stealing their IP and technology is significantly reduced. This also protects them is North Korea starts firing artillery across the border at the fabs.
Knowing Samsung, their plans most likely include company owned nuclear power stations with solar backup. The power plants will be profitable on their own.
But you fail to realise that quite a fair chunk of raw material comes from US’ “unfriendly nation” list. So while you have a lot of fabs in US, the interruption in supply will negate the benefits. Again, you don’t produce chips from thin air. Assuming you managed to produce enough chips, there are many other components to make a PC work. Again, a lot are still produce in China. So in my opinion, as long as these conflicts continue, production of any goods will be impacted.
Furthermore, this is the same Texas where power infrastructure is unreliable, particularly during winter period. Nuclear could be a way to obtain more reliable power source, but there are repercussions and other considerations as well. Nuclear plants if I am not wrong has a limited lifespan, and you need to “clean up” after it expires. It’s not as easy as blowing up the building and burying everything in the sand before building another.