alt Hacker NewsI believe you may be overthinking it a tad. I take it just to mean "work in the open".
As an example - at my home unless the weather is poor I always leave my garage door up when working on something, whether vehicles or other projects.
This is mainly for sunlight and fresh air but the end result is the same. Any neighbor or passerby can see what I'm doing, and in rare cases may actually be able to help or offer advice.
I get leaving garage door open, just for ventilation, but I always lock the main gate on driveway.
Letting random people to freely roam around workshop seems incredible reckless, dangerous, and like a pending lawsuit! The glassworkhop referenced earlier is working with liquid that is over 1500c! It can amputate a hand in seconds! The same with carpentry, my circular saw does not even have a safety conductivity switch!