Having said that, For the most part, I did enjoy being mistaken for younger.
If I was actually refused alcohol because I had no ID. I used to say Look I’m well into my thirties, I don’t carry ID, they would take a closer look and then usually just sell it to me.
You only enjoy it because you don’t actually look younger so it’s a nice “treat”. If looking younger affected your every day at work and in social situations, I’d wager that you would enjoy it less.
My husband has to buy any impromptu alcohol for us since I don’t typically carry ID. Last time I tried to spontaneously buy alcohol, after I had forgotten to bring a donation for the school fair, I was refused (my fault for wearing no makeup- I used to look like a teenager without it). I too did the whole spiel (I’m early 30s, I have children, I’m a professional), and even showed them a scan of my ID on my phone, and on “closer look”, they sent me out of the shop sans wine. As did the next shop I went to. At age 28 I was refused super glue at WH Smith. It was actually humiliating since the age to buy glue is 16 and since I was popping into the shop with a colleague I managed.
Only those who don’t actually look younger, to the extent they constantly get mistaken for a teenager or early 20s, would claim it’s a good thing.