>As an (aspiring) mathematician, I find the latter to be much more profound.

I'm not surprised. People usually find their own subject more <fill in the blank>.

I think you also don't realize how profound Einsteins relativity is. It's a lot more than acceleration and gravity (even if that's how it starts), the implications change an immense amount of stuff.

That's why people find their own subject more compelling - they understand it more completely.