It's not the weight that's the problem, it's the lifestyle that leads to the weight. You can be overweight and still healthy, just as you can be a 'healthy' weight and unhealthy. We need to stop obsessing over numbers on a scale and incentivise people to move more and eat colourful things that they cook themselves.
And really, cooking a meal takes, on average, about 20-30 minutes, and you can get away with less with good prep. How long do you sit in front of the telly in the evening, or faff about in the morning? Could some of that time be shifted into time spent in the kitchen?
It's about priorities. You have time for the things you want to do, and less time for stuff you're not really that interested in. If you don't want to make time for cooking or being active, at least admit that's what it is. We all have the same amount of hours in the day, the difference between those who have time to cook and exercise is that they make the time - it does then mean that they have less time for something else.