As people who inhabit larger bodies, when we move those bodies, we take risks.
We risk being stared at, made fun of or catcalled.
Since often, no one has ever taught us to appreciate those bodies and the way they move, we risk trying to move them in ways that are unwise or not a good fit for that particular body, and then feel ashamed or sad that those bodies move differently and have different weaknesses than those we see on TV. (And not even realize that we also have different strengths.)
We risk letting the fact that moving our bodies is a risky experience prevent us from doing the kind of concentrated practice that leads to expertise.
After all, if the first practice got us funny looks and resulted in feeling awkward and ungainly, why would the hundredth practice be any different?