Not only were Americans killed without achieving the objective, but the accident happened after the decision to abort was made.
Of course, who knows what would have happened if the mission had gone forward. It might have been an even bigger disaster.
But at least he tried. If all of the equipment had been in working order, they would have attempted the mission. It really is too bad. If it had gone as well as the Bin Laden raid, Reagan might never had been president.