>Average outdoor lifespan of 2 to 5 years if outside…. Like what?

Rough 9 lives.

>I’ve had two outdoor cats, one who lived to 21 and the other 18 and one indoor who died at 11.

This is anecdotal. Regardless, I was agreeing with you, outdoors are good for a cats health; the other poster was arguing indoor cats are inherently healthier.