But let’s take your example. I’m willing to accept the premise that movie prices have kept pace with wages (they haven’t, due to the varying pay standards you pointed out, but I’ll assume for the sake of argument).

Yes, but the point is that movies are primarily made in California, so if California raises its minimum wages, then the cost of making movies goes up, and so the cost the consumer would experience at the end is increased. If you live in California and your government increased minimum wage that’s not a big deal, but the issue is arising because some states haven’t raised minimum wage to keep up with inflation, so consumers their see a real cost increase that California consumers don’t.

But at a fundamental level, the problem there is not with California raising their minimum wage to try and keep up with inflation / cost of living, but with the other states for not raising theirs. Those states are effectively artificially lowering labour costs, which makes their consumers pay effectively more for imported goods, so that businesses in the state can be more profitable.

If a state does that to support home grown businesses that keep profits in the hands of workers, that can be a path for establishing an industry that will sustain itself and enrich the state, but in most US states, the companies that benefit are big corporations that funnel the profits to the executives and investors (often out of state) rather than average people, so the average worker is just poorer for no reason and sees inflated costs everywhere.