I am an AAer, I know many that haven't done the steps and have long term sobriety. I did them and can say that I am grateful for what they have done for me. The steps help you to view your life objectively, make changes where needed, and accept the world around us. I would suggest taking the steps because they will help you. Will they keep you sober? I don't know. I stay sober because I don't drink. I lost all desire to drink because while doing the steps I had a spiritual awakening. I continued to work the steps because they helped me to think differently and I saw positive changes in my life. Are they the only way to change? NO, but I am one not to reinvent the wheel. I did that all through my drinking career and I always ended up back at the beginning feeling worse.
Good luck