Did you actually read that paper? It's an article, not a study. The article is here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2989358/

The USA is obsessed with cholesterol because of years of bad science. Here's a 2015 Japanese Supplementary Review on Cholesterol and Mortality Rates: Higher Cholesterol = Longer Life

https://www.karger.com/Article/Pdf/381654

It concludes:

> Our fervent wish is that, through this supplementary issue, people can see that the cholesterol hypothesis relies on very weak data—and sometimes considerably distorted data. Indeed, many studies in Japan actually show that cholesterol plays a very positive role in health. We hope that JAS, and the government authorities that defer to JAS’s recommendations, will move toward recognizing cholesterol as a friend not an enemy. In the meantime, we will continue pushing for acceptance of the anti-cholesterol hypothesis, to reverse what we see as the biggest mistake made by medical science in the previous century.

And I think, I've seen a lot of studies that compare eating "normal" amounts of cholesterol to eating more than normal. But "normal" cholesterol levels in your blood still leave you with a "normal" American rate of heart disease, read, still very high. Those studies might not show much of a difference in disease rates. But studies on eating cholesterol versus no cholesterol are much clearer in showing a significant difference. On a plant based diet people can get their cholesterol below 60 and the disease rates for people with that low of cholesterol are much lower.