Try this...take your own survey...
Go up to the first twenty random strangers over 30 years of age that you see this weekend and ask them if they invest in the stock market themselves. ...or even if they just follow the market. If they do, then ask them what they know about the healthcare market sector in general and surgical robotics specifically. I bet none know what ISRG or da Vinci is, and if any do, its because they had a procedure done by a da Vinci surgeon, not because they're invested in the sector.
Then ask everyone, whether they are investors or not, who makes the iphone, what brand of TV they have and if they've ever purchased anything on Amazon. Increase your sample size if you have to. You'll then get it.