I see what you are saying about cross country, track, and swimming being less of a “team” than robotics due to athletes competing individually, however, as a member of my schools track team, I would like to share my thoughts:
Although at a meet, athletes may be competing by themselves (although there are the relays, which require good communication and the members of the relay are a team within the team), we all practice together. Sure the long distance runners will go in a group to do their stuff after warmup, and the field events go to practice, but within those groups everyone sticks together. We all cheer each other on at meets, and after meets anyone who PR’d (got a personal record) is recognized in front of the whole team.
I do not participate in cross country or swim, but at my school, the cross country team is considered a “cult”. They have a giant group chat for communicating/sharing memes (sound familiar to anyone?). I know our swim teams also are really tight and spend much time together, and are very supportive of each other.
Based on my experience and knowledge, cross country, track, and swimming are just as much “teams” as robotics is.