In my experience LaTeX is quite poor at separating content from presentation, at least when you're unwilling to rely on the default styles. All the layout commands are context-sensitive, so I often end up writing presentation code in the middle of my content, or accidentally breaking the layout by moving content around.
Comments
"It allows you to focus on your content (one feature of Markdown) while still being able to write mathematics."
That's what LaTeX does too. Its markup, generally, is semantic.
In my experience LaTeX is quite poor at separating content from presentation, at least when you're unwilling to rely on the default styles. All the layout commands are context-sensitive, so I often end up writing presentation code in the middle of my content, or accidentally breaking the layout by moving content around.
You should be putting your alternate style in a .cls file and not inline. If you are super picky about format, then none of these tools are for you.