I grew up in the Adventist church and it's been wild seeing it drift so far from its original distinguishing stances.
When I was a kid, I primarily went to Adventist schools. However, one year after my family moved there wasn't an Adventist school available. I went to a local evangelical school instead. It was a real eye-opener.
The evangelical school had a program of outright child brain-washing about abortion that I'd never heard as an Adventist. As a fifth grader I was getting daily updates about the Supreme Court nomination battle over (disgaced Nixon lackey) Robert Bork, because as early as the eighties court packing was a core strategy for anti-choice movement. There was daily news about abortion protests they were running. When I went home and asked my parents about it, they told me as Adventists we had the bible's stance on abortion: the bible says nothing about abortion. Adventists hospitals even allowed abortions to be performed on prem since they had no doctrinal problem with it.
Fast forward to now, a lot of Adventist members are loudly anti-choice, anti-vaccine (the church leadership had to post a very delicately worded statement about vaccines because they operate respectable medical schools, and had to please both the many facebook-addled cranks in their pews as well as the sane professionals in their medical school staff), generally indistinguishable from generic right-wing evangelicals. The Adventist core membership of today I have no doubt would've been mostly pro-slavery and definitely would have no qualms about shooting people in war.
The paper talks about the church's effort to go from 'sect' (firm moral stances putting them at odds with the majority) to 'denomination' (compromising their morals to fit in), and the church of today I'd say has run as far away as they could from being a sect.