The intelligence gap between lion and orca is much slimmer than orca and human.

Have you met the average person? I would highly contest this claim.

Let an average person alone in nature and they’ll starve within a month

That's longer than an Orca will live in a Wal Mart.

If we're swapping biomes I think that the naked human would starve in the open ocean in three days. If he didn't drown in three hours.

Open ocean sure but I can see orcas from my house. The average person is still going to know to swim to land and forage for food, even if they fail. But orcas won’t have the first idea how to navigate self checkout.

Why is the human naked? Does the Orca get pants?

What are we talking about?

The Orca gets pants, but as the setting is Walmart his crack must still be visible.

I've seen plenty of orcas in Walmart