I am a developer and I also prefer to leave the design to the designers. I learned long ago that I have no sense for it, and moreover I find it tedious, so my energies are best directed elsewhere.
Eh, I have no sense for writing programs in Go, and I find it tedious. I spent three days at it, and now it comes much more easily. The same goes with learning Spanish, or playing the guitar, or learning anything for the first time.
If you find the process enjoyable, you'll be good at it soon enough. If not, well, there are plenty of other things you can do, but it's not because you "can't".
