National soccer championships are generally held every year as is the FIFA Club World Cup. Many of the sports in the Olympics have a seperate world championship held every year. In general, I'd say annual championships are the norm at most levels of most sports and games.
Elo-style performance-based rating lists are somewhat rare in most games and sports. In some sports, rating lists are based on participation, or may be used to encourage players to compete for small prize funds in official events.
Also, championships generate media and fan interest, and give players something to strive for.
This whole business about giving draw odds and the right to a rematch is nonsense as well. Bronstein should be considered co-champion for the period after 1951, and Karpov for the time he drew, or else playoffs should have been held. FIDE went too far with the rapid knockouts, but some of the changes they introduced make perfect sense.
Yes, I recognise the social significance of "Doctor". But the title isn't more important than the first name, especially on the title page of a book.
That is your personal opinion, but there are many who would disagree. You don't do anything to earn a first name, but there is considerable effort involved in earning a doctorate. The title of Dr. may be more of an identifier than the first name.