kuchen
Tourist
That as you call it BS comes from 1999 - 2012, which is 30 years to 42 years after what you stated and originated by the Veterinary Medical Teaching Hospital in Madison WI and has been repeated by Texas A&M College of Veterinary Medicine & Biomedical Sciences and by UC-Davis.
Interesting limiting yourself to 2012... you may need to update your reading material! in case you (or anyone else) is interested here is an up to date literature review from the "Dog Aging Project" on the subject. It's really an interesting read and covers both sides reasonably well.
"Desexing Dogs: A Review of the Current Literature" ( mdpi.com/2076-2615/9/12/1086/htm )
One sentence I want to put particular attention towards:
"there are no non-reproductive tumors that show a risk decrease following desexing in dogs"
I don't know which study you were referencing when you claimed that other cancers decreased as well but that sort of result appears to be the exception and not the rule.