[tambourine_man]

My understanding is that there’s a minimum threshold for viral load to evolve into symptoms.

You won’t get an infection from 100 viruses, but you may from 1 million.

[nikolay]

A higher viral load means a better start for the infection. If you get a limited viral load, you give your immune system enough time to deal with it without major damage. But even asymptomatic COVID-19 leads to permanent injury, so, maybe it's better to get a massive infection and build a better resistance than many small-grade infection and accumulate enough damage without building a good enough natural defense.