You’re comparing glucocorticoids and anabolic steroids - two very different things.

Glucocorticoids reduce your body’s inflammatory response, which is why they’re used for autoimmune/autoinflammatory conditions like rheumatoid arthritis. They also promote muscle loss unlike anabolic.

Anabolic steroids (as the name implies) promote muscle growth.

I’d recommend reading up on both kinds of steroids.