I thought the same thing as Billy. the tract "Return to Jehovah" was built to heap on the guilt and get you to walk in. It won't work on anyone who has taken any kind of principled stand.
Basically it says the only three reasons you could have left is that you got your feelings hurt, are depressed and weighed down, or that you are a dirty sinner who thinks you aren't good enough.
You are good enough!......sort of. Come back and go through the process. we promise to be gentle.
I would say many of us here can expect a call very soon with these from your local elder body. Because of this specific line I gleaned.
Consider: With much prayer, this brochure was carefully prepared. It was
brought to your attention, perhaps by a Christian elder or another
fellow believer. Then you were moved to read it and respond to its
message. All of this is proof that Jehovah has not forgotten you.