Well i am not to knowledgable about the greats. But I bet there were a few who used both of these rides and were very successful.
Maybe most don't use it because it is hard to master?
Most baseball players don't foul off ball after ball until they get the pitch they want. Most great hitters will go with the pitch and send it to both fields. But Pete Rose fouled thouseands of ball off until he got the pitch he wanted, and is one of the greatest hitters of all time, as did Ty Cobb.
As someone else on here likes to use "The Greatest" Ali used the ropes to bounce off of. Most of the greats don't use this technique, but Ali did. Both of these are examples of hard techniques that only a few have mastered.