This is not a question of scale — even if the “chemist’s flask” were the entire Earth.
The paper is authored by three key scientists in the intelligent design (ID) research program: Ola Hössjer, Günter Bechly, Ann Gauger.
In the time of the early Earth, Airgas, the supplier from which the researchers obtained their materials, was not around.
Natural selection can explain “the survival of the fittest but not the arrival of the fittest.”
Any evolving system of RNAs would quickly include almost exclusively RNAs that performed no biologically useful actions.