Recently, I Have Conversed With Many Others About The "gate-way

Recently, I have conversed with many others about the "gate-way drug". As a recovering alcoholic myself, I believe Alcohol is THE ultimate "gate-way" most probable substance likely to develop/reveal [unveil] the array of additional substances available to any consumer of "Legal" drugs. I believe "Legal" to be those prescribed and or not initially acknowledged as an addictive drug. So, contrary is "street Drugs". I Refer to "Street Drugs" as literally any of those not prescribed and or purchased "Over the counter" (before 2018 New Year).
I am age 35, born and raised in Campbell, ca (USA). I am a builder/carpenter, my verbiage or concepts may not make sense..... BUT, this is why I ask...
In the medical world; has this ever been a determined or still in question? Or, even more vague LOL; you could say its like grading a diamond, ..........Subjective;)

P.S. My concepts simply put... say that the ADDICT of ANY drug/medication has been affiliated with alcoholism in some way, shape, or form and their addiction was not accepted, allowed, introduced, etc.... without alcohol being subject matter... or whatever, I mean it could be genetics ("It's in my blood") as the most far fetched cause for becoming an "ADDICT".

Thank you in advance!!!
David Sean,

P.S.S. Its BULLSHIT I need to pay to get an answer from this website. Sad Fucking joke that doctors stereotypically get compensated too much Money$ for their CHOICE in career/profession.

WOW me please and get me an answer.... doesn't need to even be accurate or true,,, but life has not seized to amaze me yet...

Thanks again....