Does the MC really believe these simulator fights can make someone stronger? Especially someone who's not a total beginner. One might say he also got stronger in a simulator since it was a full dive VR game turned into a lethal do or die situation, but isn't that the crucial difference? Even if you ignored the warrior mentality of learning by doing the real thing, what does he actually know about simulations? Orikura knows a lot more than he does. He's the real battle expert, knowing how to grow strong by not having the luxury of failing.