I know you just want to make the case for a more differentiated view here, but what you are in fact doing is defending a higher tax rate on work than for capital gains through mere ownership.
There presumably are other ways to reach these same results, but that's the policy choice we have made. I don't see it as much as valuing "mere" ownership over labor, just that we've made certain policy choices as to what incentives we want in our economy.
Discouraging long-term investment through high capital gain is not a good solution.