The SEO community is not disorganized, they have conferences, write books, communicate with each other and work together. It's a very organized community.
What's changed is a few years ago Google stopped engaging with that community and changed from a "how can we actually work together" to an adversarial relationship.
This article is actually a great read on the topic:
https://www.theverge.com/features/23931789/seo-search-engine-optimization-experts-google-results
Now that there's no dialogue, the spammers don't need to care about anything but increasing reach while not getting banned.