I agree in principle, but we should war game this out.
If there's a hard fork, there will be "theirs" and "ours". All their fiat is going to back "theirs." I bet all the institutions folow. But, if we play it right we could sell "theirs" at a high enough "price" to grab up some solo miners, reject their fork, and double "our" stack (1 BTC = 1 BTC). All the more reason to stack all we can now, later, and always...
Open to thoughts on this