Like you, I do meetings and SR. I DID have a sponsor- and did the 12 step bit- even though I was not a zealot. You do not have to tell anyone anything. It is not assumed you do the 12 steps- I see it as a general framework for organizing my thoughts.
I see some who embrace it- memorizing the book, quoting lots- but each person is different. One cliché type words from meetings that does resonate with me- is to take what is useful home- leave the rest behind.