You might, many deaf people choose to remain deaf despite having the option of a cochlear implant. Just because you wouldn't make that decision doesn't make it a wrong decision.

If it's not broke, don't fix it. If it is, get off your arse and go jogging fatty. Whether something is broke or not depends entirely on the mindset of that person.

The "jolly fat man = a front" argument is irrelevant, there are people putting up fronts in all walks of life for various other insecurities, this does not however mean that there aren't also many people that simply aren't insecure about those features.