That's the most constructive takeaway you have when looking at all their work? That's an unnecessarily limited view and doesn't add to the conversation.
From my vantage point their work fits the definition nicely.
"A collective body" [1]
...
"Collectivized or characterized by collectivism" [1]
...
"A political or economic theory advocating collective control especially over production and distribution" [2]
From my vantage point their work fits the definition nicely.
"A collective body" [1] ... "Collectivized or characterized by collectivism" [1] ... "A political or economic theory advocating collective control especially over production and distribution" [2]
[1]: https://www.merriam-webster.com/dictionary/collective [2]: https://www.merriam-webster.com/dictionary/collectivism