Interesting question from Larry.
I also have the feeling that many aikido practicioners lack a trust in aikido, its principles, techniques, and strategy. It takes time to learn, of course, but it is quite a complete and solid budo.
And there is so much in it! Aikido contains enough for a lifetime to explore. Although it is generally good to get some experience also of other Martial arts, I believe that it should not be done at the cost of focusing insufficiently on aikido. A superficial knowledge of aikido gives an incorrect impression of its qualities.