And also what you DON'T SEE. We don't see a uniform snowscape blanket of organic molecules everywhere.
That tells us that whatever geological processes happen are faster than covering by organic molecule fallout.
That fallout happens at a rate of about same as dust builds up in your house if you have a clothes dryer in your house. Max 100 m per Gyr: 0.1 m per Myr, 0.1 mm per kyr or 0.1 microns per year. Give or take an order of magnitude.
So geology happens on Titan. It's not boring.