What gets me about free solo climbing is the sheer level of risk involved. Even for the best in the world, there are too many variables which simply can't be controlled in a climb like that, which is evidenced by the high rate of death for free-solo climbers.
I fully support anyone's right to decide to take on that risk if they are fully informed of it. Personally it would not sit well with my morals to risk my life in such a way over a completely optional, self-serving activity given the emotional and material cost my death would bring to the people who care about me.
Moreover, I have qualms about such pure risk being an avenue for fame and fortune.