And Putin gives a nuke to Iranians then it's game over since Iranians don't care about MAD doctrine. Anyways the risk of the tech falling into Russia's hands is too high. Ukrainians have the smarts to develop it themselves now that it is proven as a viable tech.
Why would Russia give nukes to Iran? The Russians themselves would be harmed by an open nuclear exchange.
No, Putin's threats to Biden and Trump were more along the lines of, 'See the Houthis shooting shipping, imagine that capability spread to rebels and terrorists worldwide'
Everyone cares about the MAD doctrine, although some people with power may pretend they do not, while others may pretend they believe that those people with power don't care.
