Forum:Should inuyashas father really have died?

So the power of the backlash wave was the minimum required to defeat ryukotsusei, but inuyasha's father surely was capable of producing the backlash wave, even if he couldn't because he didn't master the tessaiga, he could have used the dragon twister, which exceeds the power of the backlash wave. Also inuyasha is significantly weaker than the Inu no Taisho when he defeats Ryukotsusei, so how is it inuyasha survived the fight, but his father didn't. It's clear that inuyasha is still weaker than his father even after learning the backlash wave as he still wasn't able to control Sounga when it reappeared. Is it possible he purposely let himself receive mortal wounds during the fight? I suppose this simplifies giving Sesshomaru the tenseiga, since Sesshomaru can't just give it back. What do you guys think?