Yeah. It can be but it guarantees nothing and if you're fat it definitely isn't. So fucking what if there's above average muscle mass buried under three feet of fat? It doesn't make any difference, you're not fit, you're still disgusting to look at, your thighs are not getting even wider because you're strong, they're getting bigger because you gained maybe half a pound of muscle mass in the last year and the rest was you ravenously inhaling hamburgers as a reward for all your hard work. Fats are always the first to start bragging when they start lifting because their numbers seem high, especially for a female, but if you actually calculate it by bodyweight and look at beginner averages they're never actually that impressive.