You might not see the Maitre d' during your cruise, but sometimes the evidence of his work shows. I never realized what went into setting up passengers at tables. They do their best to match up passengers. On our last cruise, we were traveling with friends. They matched us up with two other couples who were also traveling together. We were all about the same age group and had a lot in common. It was more than good luck that we were a compatible group.
If, for some reason, you are incompatible with tablemates, he will do his best to move you to another table and/or seating.
Just my opinion...