Ok, for the main question:
But for what you’re trying to use it for, note that typing blank lines is fundamentally how you mark paragraphs in Markdown. If you don’t type blank lines, you don’t get paragraphs.
You may be able to style your text in a way that puts space between adjacent lines (if you can somehow target the “paragraphs” but not list items and whatnot). But if so your “paragraphs” won’t be marked as paragraphs in the underlying HTML when you export, and if you copy-paste from Reading View to plain text there won’t be blank lines between the “paragraphs”.
Maybe none of that matters to you, but FYI.