I have found that alcohol and other substances or medications do improve my ability to mask and to be social. I think benzos have very similar effects to alcohol, the only difference being that they can be much more functional and sustainable if used with caution.
Benzos have the most benefit for me out of all medications, substances, and intoxicants. I take the minimum amount necessary to achieve the desired effect. Something like 50% - 75% of the standard recommended therapeutic dose. I suffer markedly with social anxiety, and benzos treat that very effectively in my case, and they also definitely increase my masking ability, all round social intelligence, poise, and ability to fit in. My ability to feel comfortable and at ease in transformed beyond all recognition. When I got my Autism diagnosis the other day I asked the guy about benzos and masking and anxiety. He understood exactly where I was coming from, and explained in terms of anxiety reducing my capacity to function, and so he could understand why I have been drawn to benzos. I can get so overwhelmed by anxiety and I had never thought of it in terms of reducing my capacity before, but that makes a lot of sense, and I think that is exactly what is happening.
I have found that as with alcohol getting the dose right is very important. Up to a point these things can be beneficial, but the more and more one goes over and above and beyond a sensible amount, the more literally one can become "arseholed" and take not giving a **** about what anyone else thinks to an extreme. Too much is not helpful, and I think it can lead to too much lowering of inhibitions, so that everything goes out of the window.
It's all about getting the right balance. And of course remaining vigilant about the potentially addictive and problematic nature of self-medicating in ways like this.