I've witnessed a couple medical incidents that required security to clear the area and it took passengers to do the job because security just stood there and watched the chaos
Not really true. You're more likely to have false negatives with antigen tests, but you can test positive upwards of 12 weeks after recovery with a PCR test.
Air2Sea at its roots is just a travel agent.
But RC can subsidize some airfare, especially international routes. You can also change your flight for no penalty until cruise final payment.
This is only a good thing if you want pre-cruise testing gone. More leverage for the cruise lines to say it' not necessary if the feds don't deem travel tests worthy of federal funding.