To be clear - as of today, many researchers would agree that language is still a uniquely human phenomenon. They discuss this pretty explicitly in the article linked, how it is important to draw a distinction between language and communication. There are no non-human species that have been found to use language for the Chomskian definition of language (using a finite set of symbols to represent an infinite number of communicable meanings).
However, this "dogma" as you call it is beginning to be weakened as researchers document more nuance and complexity in non-human communication than ever before, and so some researchers begin to say, "maybe we shouldn't have this all-or-nothing view of language". But it is simply not true that researchers are suppressing evidence of language in animals out of a desire to enslave and torture them.
However, this "dogma" as you call it is beginning to be weakened as researchers document more nuance and complexity in non-human communication than ever before, and so some researchers begin to say, "maybe we shouldn't have this all-or-nothing view of language". But it is simply not true that researchers are suppressing evidence of language in animals out of a desire to enslave and torture them.