Well Imo I support what this dude said.
MC can get away only cos of the plot armor, “I became strong so I could protect bla bla bla” empty words like that are worth nothing if you can’t kill your enemy, think what if the plot armor didn’t activate, you lose and then all those people will be next.
Imo if I’m in his place, my mindset would be getting strong to kill easily, not easily kill.