What do your morals have to do with being obese?

Being obese itself does not have nothing with morality.
Most morals/ethics systems and beauty standards forbid to be obese, although there are cultures where it is encouraged and praised when women get obese and stretchsmarks are praised like diamonds (Mauritania gavage is related tradition).
There is even an island in Pacific Ocean or such where men with large bellies considered as beautiful by there standards.
Aside of beauty standards, there are various medical conditions and medications that can cause slower metabolism, skyrocketing appetite and weigh gain.
The inclusion of gluttony into death sins is likely caused by simple fact that food production was quite inefficient thousand years ago, and it was not so easy to make a lot of cheaper food.
Still, many of "noblemen" were fat, obese, and ate much more than an ordinary peasant, and "swim" in luxury of all kinds, including lack the mere need to work or do something thmeselves.
Today considered that poor people just can't afford to buy "healthy" food and don't have enough free time to spend hours in gym, yoga classes and be physically active or do "slow cooking". But yet these business class chairs much wider than economy class chairs in airplanes, LOL
Today main problem of society is lies everywhere - lies about beauty, morality, and so on.
It, among other things, cause stigma of beautiful round soft obese people.

What?

I think they meant "motivation" not morals.

Although...one of the 7 deadly sins is gluttony

Is being morally obese a thing?

Nothing

in other words I'm hungry gimme More All

I ate them all. They were tasty.

Probably something about gluttony. Meanwhile there's fat priests in Vatican city and the catholic countries in Africa are starving