These do make beta ameloid sound like a virus-net, sticking to any and all virii inside the brain. And since herpes has that time-release capsule to keep reinfecting a host user, that person's brain could have more beta ameloid plaque to clean. The efficacy of brain cleaning goes back to numerous factors, including age, hours of sleep, air quality, diabetes and other diseases, etc.

In short, it's based on number of virus infections, which herpes greatly increases. So I agree that your hypothesis is sound.