Dem candidates on a contested convention

This is a scary premonition. The moderator asked if there is a contested election would the candidates agree that the person with the most votes wins it? Bernie of course said yes, but all the other candidates said a version of "let the system play out," meaning let the Dem rules decide who to choose. Does anyone else find that acceptable?

"Bernie Sanders is the only Democratic candidate on the debate stage who thinks the candidate with the most delegates should win the party’s presidential nomination even if he or she doesn't have a majority.

"His rivals on Wednesday night in Las Vegas say the party should let the convention play out according to rules set by the party, which allow for multiple rounds of voting if a candidate is unable to get a majority of the delegates on the first round."