Obesity hasn’t changed that much. Around 70% of Americans were overweight or obese before the pandemic. Diet is the most important factor in weight gain or weight loss. And except for a few dumb months at the beginning, parks and outdoor areas are open for recreation. I’ve been running 4x a week for the whole pandemic without issue where I live, nothing stopped people from exercising if they wanted to follow the health advice that they’ve been hearing for decades.
Vaccines aren’t a magic bullet. But they’re the most cost effective item we have. You cite some irrelevant statistics but appear to agree with my statement that the vaccines remain more than 80% effective against death.
The vaccine costs less than $100 and takes about an hour of time to do. There is no way to lose weight that cheaply or quickly and as a result people continue to ignore government advice and health campaigns urging them to do so.
Moreover, losing weight does not stop you from catching or spreading COVID at all, whereas the vaccines have been shown to reduce transmission.