Ignorance is a common lot. Fear of what people don't know is widespread.
Even here, in this ecclectic forum, some believe that Americans never put a foot on the moon..
So, I'm not at all surprised that people ignore basic stuff.
I told a friend of mine "exercise is good for you". He replied, in all sincerity, "the jury's still out on that".
I can land easily on a Venus...
Can you land on Uranus?
That would be a much more difficult task..
(Your question was quite predictable and I was waiting for who would ask it).