Is it really that hard not to shake with a SLR lens? Do photographers use anti-shake

It doesn't matter. Anti-shake is basically only applicable to telephoto lenses. Many high-quality fixed-focus lenses are not as anti-shake as zoom lenses. Photographers must choose a good photographic environment, or create a good environment, in order to take good photos. Under this condition, the exposure must be satisfied, and anti-shake is meaningless, especially when the Jiao Da aperture is fixed.