Why do boxing fans say that James Toney could beat Brock Lesnar(in MMA)?

Many Boxing purists are in denial and unwilling to accept Mixed Martial Arts as a real sport, they continue to call it human fighting and they just will not accept the turth of the matter. The fact is that MMA is a true fight where fighters are not limited to only throwing punches but can use kicks and takedowns also along with submissions. Toney is going to get destroyed by Randy Couture and and would literally get eaten by Lesnar...as far as Brock using roids there may be no positive test but I would highly suspect that he did as most guys in WWE were using them also Brock absolutely refuses to speak to anyone regarding steroids and hides behind the "I've never tested positive" defense, if you didnt do something you would say I've never done steroids not I've never tested positive.