Not everyone wants to take their idea and build a company around it. Some people love to engineer and invent but don't have a passion for building a company (marketing, sales, hiring, etc.) That's where licensing your product comes in. You contract the right to manufacture and sell your product and get paid royalties on sales. (Then you can get back to inventing and have the passive income).
Tours of Techshop are free and ad hoc. For food, McDonalds is next store. If Techshop parking ever gets full, there is free parking on the side streets.