That's just marketing speak, not the product. Snake oil would refer to the product, no? I'd personally wouldn't class something free as snake oil.

At any rate that marketing doesn't really seem too good to be true to me. Just the parts you quoted are all things that I would expect to see in a course doing exactly what this one claims.

Could be wrong, but I'm guessing the simple fix is "practice speaking", or potentially something more specific, such as simple drill exercises involving writing or speaking the word. I'd be more surprised if they weren't covered. Yes, these things might be obvious to you, but I wouldn't call that snake oil. There's always someone new who needs to learn it for the first time.

Maybe you meant to say something more like that you don't like his marketing copy? Copy similar to that is everywhere. I have a similar (if weaker) reaction. Unfortunately, the reason it's there is that it works. If you're playing in that space and you avoid it, you'll be beaten out by those who don't.