I get your point that genes are important and some are blessed while others are not. But regardless what your genes are, you need to find a way to take care of yourself. You are not entitled to someone else taking responsibility for you and your problems.
Here's the crux of the issue; for most people who are fat, finding a way to take care of themselves is so onerous, complex, and difficult that they're not technically stuck, but they're effectively stuck. If you need to drive more than an hour to get access to food that won't be terrible for you, it's not surprising that so many people have a problem.
Who is shoving food down your throat for years on end?
Telling people they should "take care of themselves" is cute, but it's completely pointless. You have to solve the systemic issues.