The IJ doctrine was developed in response to Christ not returning in 1844. It was sometimes referred to as the cleansing of the sanctuary, not the investigative judgment, depending on who wrote the article, pamphlet, or book. Uriah Smith, not EGW, wrote one of the early, most extensive treatments in 1857. EGW wrote on the topic decades later, including an emphasis on the investigative nature of the judgment.
Psalm 130:3 says If the Lord marked iniquities, who could stand? but there is forgiveness with Him.... That word "mark" can refer to "finding fault." This psalm contradicts any IJ interpretation that positions God as our enemy, looking for reasons to shut us out of heaven. The IJ doctrine leads some people into perfectionism, legalism and uncertainty. The gospel leads us into rest in Christ. If people don't like the IJ doctrine, they can be delivered from diabetes, obesity, hypertension, constipation, etc. through the SDA health message. A person must have faith in Christ to appreciate [?] the IJ. An atheist can be benefitted by the teachings found in "Counsels on Diet and Foods."