Why is the cyclops on the outside?

[koufax80]

So, I’m not sure whether to be embarrassed that I’ve never thought of this or embarrassed because everyone else already knows why, but why don’t they put the cyclops on the inside? I get that now it’s kind of a Rolex trademark, but wouldn’t a cyclops make more sense functionally on the inside? I’m sure a lens could be cut to make it work and it would allow for a perfectly flat crystal, less chance of hitting it. (Admittedly, I only thought of this because I saw a new watch that utilized it).