I think this is the worst part of learning to program in CL: the self-flagellating, cynical CL users and the haters that parrot this old, barnacle-ridden trope: it's too powerful! Macros! Nobody can understand it but gods and strange people on the Internet! You will have to listen to these people constantly invade every forum, discussion group, and chat room on the Internet to tell you how you shouldn't be learning CL.
I like powerful languages. They have neat ideas. If they help you get more done in less time with less code, great. Not every software project needs to be a tedious, boring slog that takes 30 developers 8 months to do what you can with CL in a week.
Keep learning CL if that floats your boat. I had a blast learning it and it's a great tool to have and a constant source of inspiration for ideas.