So the hashrate's correlated to one of Bitcoin's (better: good money's) properties (scarcity) which makes people value Bitcoin more. But, I must insist, the true value of Bitcoin isn't measured in hashrate. It's as if you claim "The real value of a tiramisu is measured in the artistry the biscuit is dipped into the espresso." Which, indeed, makes a better tiramisu and let's more people enjoy it/value it more. But because there are crazy people out there who don't like a tiramisu no matter what, or because they've eaten three slices already and are full - no Italian nonna will succeed in providing value.