I actually have not even remotely the same problem with Naruto Speeches or just about any other speech in anime.
It's not like I remember most of them when I think about Naruto, but the one I do remember (the canon ones) are actually pretty neat, often very sad, and inspiring.
My all time go-to when it comes to Naruto.
Naruto talking to Zabuza to convince him that Haku gave his all and everything to him.
Zabuza realising that even Ninja's aren't tools, they are human too.
Or in Grimgar, I completely understood what is happening and what is being meant with certain statements and/or certain visuals during these speeches and discussions. I think the scene where MC spoke to priest-character's ghost for the last time was one of the most amazing dialogue scenes in my opinion, it had this nice "is he actually only talking to himself" touch to it, where you start to realize that the priest-character never said *anything* MC didn't already know himself. It's as if that "ghost" was just MC giving an image to his inner monologue
So...I really can't say that they never make much sense, because they actually do make sense in other shows in my opinion.
I have *serious* problems following Subaru whenever he talks and it's the most problematic when he tries to hold an argument or speech. I'm not exxagerating when I'm saying that I do nearly not understand a single thing other than "I like you, be my friend" or "I love you" but that's something I understood from his actions more so than from what he is saying in that situation.
If we take this speech as an example. All I understood (or think I understand) is that Subura kinda thinks Beatrice is looking for a lover? And he obviously says no because he wants Emilia.
But does Beatrice even look for someone like that? And not just a friend or a very dear person? I think she made it pretty clear that she is scared of befriending someone, because that would mean she might lose him/her again.
It seemed to me that she needed a reason to get out of the libary but no one would "free" her from her promise.
And Subaru didn't free her either, it's more or less him convincing her that she should just do it herself, isn't it? I really don't know.
I really, really, don't know what the heck he was talking about all the time.
I know the purpose, but I do never actually understand his arguments or reasoning.
He is a horribly written character in my book because he is always *super* annoying.
I always blamed his insecure character for this (as seen during his butler-training) in the past but it never gets any better.
I really understand that he goes through freaking hell all the time and everyone would just break if they had to endure what he is enduring. But it's all so weird whenever he tries to argue something.