You are correct, but...
When people ask for someone else's setup - it's either because they want something to start with - or have no idea how to setup their car. They may get lucky and the setup matches their driving style and abilities. Or they maybe just smart enough to take it from their and get the car setup to their liking. Worst case scenario would be, they don't have a clue what to do with a setup that isn't working for them.
Everyone is in this hobby for different reasons with different expectations. We all have different abilities and shortcomings. Some people are patient and want to learn to do things right - others want a quick fix. For some, they will never get it right, no matter how hard they try. It's no different than anything else in our lives.
Just my 2 cents..