But I'll bet that the isolation plays a big part too. I could be wrong about this, and the article only mentions a few cases where people found that alternative cultures were simply more accepting of their quirks, but it seems like people on the spectrum often think a little differently, are painfully aware of it, and feel the need to be constantly scrutinizing their words and actions around other people. Combine that with all of the constant pressures of modern life, between staying on top of bills, holding down a job/career, managing social events, keeping up on housework...it's like fingers on a chalkboard to a spectrum dweller's overarching craving for some quiet isolation every now and then. Life just feels so loud and hectic, with some days dominated by a desire to tuck your head between your knees and scream at the whole world to just hold up and calm down for a goddamned minute. And the aversion to sudden, unexpected changes doesn't help. How can you ever really relax when just the act of navigating day-to-day life feels like tap-dancing on an avalanche?
So would it really be surprising if it does turn out that many such people reach for the bottle at an early age? I don't think so, but I'm sure glad to see people putting more effort into finding an answer than my vague 'that makes sense' hand-waving.