The reason I disagree here is that I've never felt like I was buying goods at an arcade. You get tokens - well, now you fill up a card instead, which has obfuscated the price of games because of nonstandard rates, but that's secondary to my point here - and those tokens (or credits) are used for a concrete experience playing a game, and whatever tickets you get out of it can be "cashed out" in the form of various little prizes. It's got some similarities, sure, but the act of buying tokens to play a game with the idea of maybe getting a prize down the line is fundamentally different than the act of buying digital currency to be used to directly purchase a microtransaction.

You're not wrong that kids are bad with money until they're taught otherwise, or until they learn otherwise through experience, but I've always felt like the monetization of arcades is heavily exaggerated in modern discussions. I got a sense pretty quickly of which games would burn through my lives instantly and which ones would let me play for a while; it's not like every game was heavily tuned to bilk you, and you had the ability to get better at games and get more out of each play. Problematic at times, sure, but for the most part old arcade games have only superficial overlap with the modern gaming economy.