1st: Man O'War's funeral was on the radio and many people went to his funeral, yes, that is true.
I can appreciate your love for Man O'War.
2nd: They DID NOT breed Secretariat to "almost anything" as you think. Secretariat was bred to 40 mares a year at most, and he was in no way overbred. SECRETARIAT will live on in the Thoroughbred breed through his daughters, who were exceptional producers, especially of stallions. Storm Cat, the most successful Thoroughbred stallion in the past 20 years was out of Secretariat's daughter, Terlingua. Gone West, another very successful stallion was out of Secrettame. And, perhaps the stallion who is the savior of the Bold Ruler male line, A.P. INDY, was born from Weekend Surprise, another daughter of Secretariat.
3rd: How can you say that if it was not for Man O'War, Secretariat wouldn't be here? I am sorry, but that does not make sense. Secretariat has no Man O'War blood or breeding anywhere in his pedigree. In fact, Secretariat was produced almost exclusively from stallions imported to the USA after the year 1900. Only one of his lines, that of his sire, Bold Ruler, who's dam was Miss Disco, by Discovery, who was by Display, by Fair Play, has any American blood at all.
This is my first post on here, and I didn't want to start an arguement, but rightly so, I do have to put to rest any misconceptions of fact.
If anything, Secretariat will live on in more then just the Thoroughbred breed. There were 2 mares bred to Secretariat as test mares to see if he could get a mare in foal. Of those 2 mares, one was an Appaloosa, and that resulting foal - First Secretary, is in the Appaloosa Racing Hall of Fame. The 2nd foal was born from a Begium mare, and was named Statesman. Here's an article on Statesman: Statesman - gelding by Secretariat
Back to the movie. The Belmont Stakes scenes were filmed at Keeneland racetrack in Lexington. The way the Belmont was filmed it is(in my opinion) close to impossible to understand what Secretariat really did in that Belmont Stakes of 1973. Anyone who watches the race in the movie could not fully understand what happened by just watching the movie itself. That is my opinion.