The two travelers on the show are people who come from a mixed martial arts background. One is actually a champion. Yet every week they get beaten by people in traditional martial arts.
1) Only Jason Chambers comes from an MMA background, while Bill Duff comes from an NFL background
2) The hosts do not get "beaten " by the martial artists they meet, but merely spar with them under the rules of the art they are featuring.
I think one of the reasons the OP left Aikido is the lack of interest and involvement Aikidoka show in other styles.