The fact is that there aren't actually more parens than most languages. Take a look at any JavaScript code base and you'll see far more parens there.
One benefit of Lisp syntax is that it provides you visual information about relationships in the code, since it's structured as tree. The nesting tells you how functions relate to each other at a glance. It makes the code easily scannable, once you're used to reading it.
Another big advantage is that you can use a structural editor with Lisp. You don't actually manage parens by hand, the editor does it for you. You can see it in action here. https://cursive-ide.com/userguide/paredit.html
The syntax is actually one of the easiest ones to learn, because there is very little of it and it's very consistent. Just because it's not familiar, doesn't mean it's hard to learn.
I use Clojure at work and I regularly train co-op students. I haven't had a student who took longer than a couple of weeks to become productive with the language, or didn't love using it. However, most had a negative reaction to the syntax initially.