"Choosing to enjoy life" is not how most people get fat. It's not meals with friends and family but rather scrolling tiktok and eating potato chips.
But on the other hand, even the most minor enjoyment (especially the kind that will make you guilty later) is still somehow a form of enjoyment.
Perhaps the bigger lessons is that small pleasures can be expensive in the long term. More than we think.
Plato puts it well in Gorgias; where he makes an analogy of two men tasked with keeping jars filled with wine, honey and milk.
The first man has jars of good quality, and is able to fill them up and they stay full and then he can go on about his life and be happy, the task of keeping them full causes him no grief. The second man has cracks and holes in his jars, so the pleasure always leaks out and he needs to spend every day topping them up in order to avoid misery. He's completely enslaved by the task and it's causing him daily grief to keep them full.
It's more useful to view resolve, moral continence, self-control as things that you do rather than things you have been granted.
Food for thought.
Our biology enjoys those dopamine hits
My experience is that the enjoyment one feels with the first few bites quickly transforms from seeking the pleasure of continuing, into avoiding the pain of stopping.
I don't think many people really enjoy it. It's just less painful than other things, or they don't have the resources to do what they actually want to do, or their choice requires something that's not possible right now... Chips and TikTok is the fallback, not the first choice.
I for one gain weight pretty easily when I start eating carbs such as pasta and bread without restraint - even on holidays when I am pretty physical.