Part of what prevents this is bondsmen are not taken willy-nilly (except Harvest Trials). You have to do something outstanding in the fight . . . like taking a Kit Fox Prime and nearly beating a Dire Wolf in a long range sniping duel.
1st you are given credit for balls- likely the Dire Wolf would refuse that duel since it could be a insulting match. If it was like a Kit Fox, Nova and Hellbringer, and the other two dropped like chumps but the Kit Fox fought smartly and was a single hit from victory, its still a accomplishment for the Kit Fox pilot.
2nd to even have a chance to pull that off you have to be good (G/P skills, SPA, edge whatever) . . . though I will grant edge (reroll that Gauss hit location!) could make things interesting.
3rd the Clan/warrior has to be in the mood/mindset to take a bondsmen. Jaguars (after BoK) might take a freebirth bondsman (see Horse) but will not let them become a warrior. Vipers (after BoK) do not seem inclined to take one, superiority complex. Dirk Radick, and to a lesser extent his cluster, were killing freebirths when facing other Clans or even in the Wolf touman. Warden Wolves will take Falcon & Jaguar bondsmen, but its questionable if the Falcons would. I am not sure the Crusader Wolves would take a Warden Wolf bondsmen or vice versa- which does not even get into the later bloodname/house problems.