yes. if it takes him one second to realize the ref is stopping the fight, then he does not have the appropriate reaction time and should not be sanctioned to fight.
don't try to act as if this is some physical condition that he has, or that he's fighting so hard for his family. it's bullshit. everyone else is fighting equally hard, and they aren't cranking on shit or being pulled off by the ref while they're applying subs. there are tens of thousands of people competing in thousands of grappling tournaments every year, and a ridiculous majority of them lets go of the sub as soon as their opponent taps. palhares has done this shit in MMA and in ADCC. it's not bad luck, or people picking on him. he's either doing it deliberately, or he trully is retarded. in both cases, he should not be fighting anyone, anywhere.
the phantom tap excuse is pretty dumb, too. it doesn't happen much at all and i can't remember a fight where someone let go after a phantom tap and actually lost. especially in the ufc where there's like 12 cameras on the fighters at all times.
and if i were you i'd drop the "babby" crap because you're making yourself look like a 14 years old idiot.