Unlike on Google search, if you see a bot on Lemmy, or Mastodon, you can just block the bot and never see them again. Follow accounts/communities you trust to be reliable for finding info on various topics to eliminate the chances of running into the bots (since you more likely will be looking at your following feed.)
I wish seo would make the web more lively again but I just see them as a lost cause, and the Fediverse as the better future.