Could be, but I'm pretty sure agreeing that either one of you can walk for what ever reason or no reason is not a commitment and that is what a marriage is.
Last time I checked, a marriage license is not an ironclad contract of indentured servitude for either party. If you feel modern marriage lacks "commitment," you need to take it up with the civil authorities and/or your congresscritter. As for your opinion of the depth of my "commitment," it has been duly noted.