Same can be said about using a keyboard for everything. Just like a real F-16 right? For me at least, having a clickable pit increases the immersion I feel when flying the sim. But I guess for you thats pointless eye candy.
Not really, I can use a HOTAS setup with pedals and multi-functional-displays to control everything instead if I choose to. For the cockpit mouse clicking, it doesn't change in terms of the input, thus why it's kind of there just for show.