I agree that the world tours were probably the most important events on the old pro calendar...however, they were only one event, not 100 events.Gonzalez and Kramer are generally thought of historically by experts to be GOAT contenders. For example Vic Braden (just a few months because he passed away) told me that he believe Jack Kramer was the best player he had ever seen and he felt that he would have been number one in today's game, with of course a few adjustments I would assume. He went into it with me and I found it fascinating. Braden forgot more about tennis than any of us would ever know. He was logical and very intelligent. Others who thought Kramer was the GOAT was Budge (who really believed Budge was the GOAT), Sedgman, Hoad, Bromwich, Segura (that's huge because Segura saw everyone play), Riggs, Metzler. Gonzalez thought Kramer was number two after Hoad but I believe Gonzalez said Hoad was the best when he want to play (or words to that effect) so I do wonder if he thought Kramer was number one for average level. Vines ranked Kramer number two of players after WWII but I believe Vines ranked Kramer number three overall behind Tilden and Budge.
The World Championship Tours have to be included in the great resumes of these players. It is idiotic to ignore events in tennis of this magnitude!
People and many experts think that the majors are the only important events in tennis, currently and in the past. Of course that is wrong. There are so many flaws to that type of thinking that it would take forever (exaggeration of course by not by much) to go over it in detail.
Events change and we have to look deeply into history to get the true picture. There is no doubt the World Championship Tours were the biggest event on the Old Pro Tour. Wembley, the US Pro and the French Pro weren't on the same level of importance. Gonzalez has as his main concern most years to win the World Championship Tour. This would of course give him a lot of money (which helps with prestige in any event) but also that it assured him of being World Champion for another year which would again put money on the table. We cannot forget that the Pros in those days weren't the zillionaires they are now. If Gonzalez lost he would have because a has been. Kramer in his World Championship Tour with Riggs knew he had to win or he wouldn't get another chance. Gonzalez was lucky he got the second chance when Kramer had to retire early due to arthritis.
They were ostensibly (though not really) about determining the better of two (usually) players for that year.
That could have been accomplished in much shorter series, perhaps in ten or twenty matches.
In fact, the world series became much shortened, with the later ones in 1961 and 1963 being for short durations.
So, whether you determine the winner of two players over a span of 100 matches or a span of twenty matches, the end result is the same, one winner and one loser.
I would not give greater weight to those marathon over-100 match series of the early fifties, just because they were long.
The length was not about competitive calculation, but about making money in small town locations.
In the end, the world series accomplishes only one thing, the better of two players.
So that is just one event, not 100 events.
I would give the WS tours the status of one major, remembering that in some years there were a good number of top pros, and it might be tough to win the top pro tournaments.