Sure why not? It is not as if the Senate is packed with folks worthy of the office in any event. There are a considerable number of dullards and hacks already there.
I think there's a reasonable counterargument that says a campaign is at least representative of some form of competence.
Also, there's another reasonable counterargument that says her positions on the issues should be known as well. Is she to the left or the right of Schumer?
Well competence at campaigning I guess, or being in the right place at the right time.