We can for example, use deep brain stimulation to directly stimulate emotions

We can stimulate emotions, yet we are nowhere near a satisfactory explanation of why each emotion has the psychological effects it does. It's quite clear that we can only play with the brain at a very coarse level.

Finally, a question if you don't mind: what hypothetical evidence would convince you that qualia can be explained by our current laws of physics?

Reliable brain simulation would be solid evidence here. Others have pointed out that we probably won't be able to revive cryopreserved patients without a thorough understanding of brain physics.