I don't really understand the fact that how it will be beneficial for the Bitcoin mining ecosystem?
Well, first, the analysis is from Bitcoin Magazine, so whatever happens, it's good for Bitcoin.
War? Good for Bitcoin! Economic slowdown, good for Bitcoin. Humanity wiped out, good for Bitcoin.
Now their take is that the hash rate will be more distributed since the US will not buy that many ASICs and farms in other countries will suddenly pop-up a a consequence, but that is ignoring assembly in the US, the enormous cheap electricity available, the money thoe companies have and the amount of ASICs they already have purchased.
Also, second thing, it's irrelevant where the farms are if they mine on the same pool, so as long as Mara which is a US company has its 50% of the hashrate from Japan or India it doesn't matter, they will still obey by US rules.