Questions about drug addictions .?

Tell me if any of the following statements are untrue;

If an addict enters rehab then checks himself out lying saying that the doctors released him to do his 12 steps at home will he fall back.

Do the 12 steps work?

Or is it simply the will in the person?

Do addicts going through detox resort to simpler methods of a “high”. By stealing, lying and otherwise being a nusiance?

Thanks in advance.
Thank you i didnt mean to point out and say all addicts. My dad is an addict and I know that he is unlike some and like some. Thank you all for answering!
Thank you so much for sharing what you have gone through! I am in awe of people who continue to use thier knowledge in a positive way. Thank you and may God bless your journey into forever wellness.

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