There are indeed practioners of aikidō who understand it as a certain budō, that is organized by the iemoto - System. Which implies, that it's understanding is not just open to privat opinions and determined by the practioner.
And they're certainly entitled to train in a manner that is, as you say, "organized by the iemoto - System." But Aikido has grown beyond the boundaries of that same system. You may decry that fact but it's truth is demonstrable. One need only look at Tomiki and Tohei to see two evolutionary paths Aikido has taken over the years.
Training goals are objectives that may or may not change over time as the student progresses. Understanding Aikido isn't a matter of opinion, it's a process of discovery experienced by each individual practitioner largely based on personal goals.