OK I'll be honest - a part of Tomiki Aikido is sportive but unlike pregnency (you can't be a little bit pregnent) I can not see how this destroys Tomiki's place as a martial art.
As has been said ad nauseum. Randori supplements kata training. Adding an extra levle of intensity to the training during competition provides further lessons. Which lessons or how it supplements? Well there were several posts in this thread which were very clear.
If your entire training revolved around winning tournaments you would no longer be doing Shodokan Aikido. I can not think of one dojo that works like this.