You can tackle Ganon with four hearts, and yet, strangely enough, very few people do that.
But he's clearly having problems with them, and your response is, essentially "git gud".
He just started playing.
Oh, I'm sorry. Your advice was "hit the obvious weakpoint" and THEN "git gud".
Not only that, this task will likely eat all his weapons. It's not a good idea.
The cyclops always has weapons