Decrease Longevity damage

I KO'd Maia in a 30 second fight where they hit me 0 times and my Longevity went down 0.9% WTF? lol

I TKO'd Jared Connonier in the first round, don't recall the strikes but my Longevity went down 3%. Are you really saying if I had gone 5 rounds, my Longevity would've gone down 15%? I would've been super pissed if that happened.