I am both autistic and introverted. I'm not really capable of socializing in a group larger than 3-4 people. I just stop talking when the group reaches a certain size. If I don't, I may lose hours of my life (and sleep) to an anxious analysis of what things I shouldn't have said.
I am in a small minority. My autistic colleagues do not struggle with this in the same way I do. While I may be a bit of an extreme outlier, I do exist. If I could be otherwise, I would. Throughout my life I have wanted nothing more than an accepting group of friends, and I have worked hard at trying to achieve that. I have never succeeded. At age 41 I have lost hope that I can be as you describe.
I do have wonderful experiences socializing with others 1:1. My group socialization is limited to that with my wife and two children (aged 4 and 2). I love people. I admire them. But there are some aspects of my nature which are so intractable that they cannot be changed no matter the effort expended or identity adopted (or jettisoned).
For context, the first 40 years of my life, I did not identify as autistic, nor did it occur to me as a possibility. I knew I had difficulty making friends, but I did not intentionally form an identity around that fact; to the contrary, I actively worked to change it (to deleterious effect).
I offer this in the hopes that it will loosen the "rules" around which your viewpoint is formed. It is not always as simple as your comment makes it out to be.