the situation is technically "(1) "ability to impregnate people with horror eggs" was the surprise, and then from that point forward people could choose whether or not they wanted to play out oviposition smut in that time frame..."

but there is nothing else to do ingame in august and the eggs are so tied to the game plot that it's impossible to truly avoid even if you aren't playing it directly

as another anon said it's not an opt out if the only way to avoid is "take a hiatus and don't play this month"