Spey casts, such as single spey and double spey, are easy to perform on single handed rods. Spey casting with a single hander will give you many advantages when working tight shorelines with little backcasting room.
Of course, nothing beats a two hander, IMO. Better line control, easier casting, longer casts, ability to cast big weight & sinks tips to incredible distances, extra reach when high sticking, better fish fighting ability, a wider variety of lines/tips/leader arrangements, reduced casting stress/ injuries to elbows, wrists, back, greater casting/line control in strong winds and the list of benefits goes on. You won't know what your missing untill you try it.
ps. There are no stupid questions in flyfishing, as they are the same ones we have all asked at one time or another.