This probe is supposedly going to do what we have not been able to do with Earth - study the planets interior. We still dont know a great deal about our own planet and we live on the damn thing.
I will quote you.
"What nonsense."
Stop projecting your ignorance on others.
There is much we dont know about out own planet. There is a lot we assume though.
Also, 70% of our world is covered in water. Most of which we have not explored.
The most we have been able to dig a hole is ~12km deep. The crust alone is over 60km. And you think we have learned almost all there is to know about the Earth?
I will happily quote myself to you
"What nonsense"
And I will quote yourself back to you
"Stop projecting your ignorance on others."