The issue is for the airline to solve, since they are the ones trying to make seats comically small.

Also, you have to include other attributes. E.g. Not my problem that you have freakishly long legs, if you have to prevent me reclining then maybe you should have to pay for premium economy. And what if you are broad shouldered? Same deal, not my problem, you have to stay inside the boundaries of your own seat.

I would rather we used regulation to make economy seats a bit larger. Call it a safety issue, since it is.