The big, strong, tough guy goes to class, and he keeps getting tapped by the skinny, technical guy. It begins to change him. It makes him humble. That's what Jiu Jitsu does to you. It makes you humble.
The only guys I like watching these days are Roger Gracie, Marcelo Garcia, Kron and a few others. Those guys finish and go for submissions. They don't hold the sleeves and stall for ten minutes.