If that tool is sold as "This magic wand will magically fix all your problems" then no, it's not possible to hold it incorrectly.
If your position is that any product that doesn't live up to all its marketing claims is worthless, you're going to have a very limited selection.
Why does it matter how it's sold? Unless you're overpaying for what it's actually capable of, it doesn't really matter.
Gotcha. I don't see these tools as being a magic wand nor being able to magically fix every problem. I agree that anyone who sells them that way is overstating their usefulness.