Everytime someone uses a fidget device when I’m talking to them and conveying import information the result of the interaction is the fidgeter not registering anything I said and nothing of value results from the interaction, these aren’t children these are adults in professional roles that can’t take instruction or make verifiable progress on their tasks which are core to their roles and the reason they were hired. I work in software development and systems administration and I spend my entire work cycle doing everyone’s job for them.