Looks like you've never been at high altitudes...
Yes, it worked out great. He recovered and managed to do another attack, got killed anyways, but not telling was still the right choice in case his last attack worked.what exactly was that demon feared of? To be killed by that elder demon? Worked out great, huh? Dumb
Also, there are things to fear more than death, and we don't know what that demon is capable of.
holding a child prevents the hero from attacking the elder demon? Sigh. screw that poor guy who got turned into a demon (and killed for sure) because of that decision. ����
Generally, I'm disappointed what aturn for the ... generic this anime took after the good first episode and the fun training arc. Bummer
And the problem is? That a rookie Demon Slayer when faced with the big boss who massacred his family and potentially holds the knowledge on how to turn his sister back hesitates because he's confused about his nature? Yeah, that's a BIG problem story wise...
But yeah, let's go find other meaningless little details to complain about to completely discard the series just so you can say "you see, I was right about not wanting to watch this show".