I usually travel with a single carry-on bag when I travel. It's a tiny hard sided suitcase that fits in the carry-on space and includes enough clothes for a week. I don't technically
need a free checked bag nor would I typically use one as I want to avoid the insane wait at the luggage claim. So this I disagree with. I don't mind charging for checked bags, but then I don't mind paying more for air travel for certain things, so I don't think that this particular example fits.
I wholeheartedly agree that tipping should go away. It's literally a remnant of the post slavery age in America and has a nasty habit of lowering workers wages. Another problem is taking dine and dash bills out of the waiters wages. The waiter shouldn't be paying for deadbeats.
So I agree with your general point, just not on the airline baggage example.