I think your sims are very pretty. I also play without CC and I am very happy with how my sims look. I think it depends on how you define beautiful. For me it means the sims have harmonious features and their overall look, including hair, make-up, clothes present a believable character. Make-up in the sims doesn't work like in real life where you use it to disguise or accentuate features, in the sims you can actually change them, so in the end all CC does is it provides more varied looks but not necessarily more beautiful.