If turning off cookies is a time-wasting chore, you are more likely to accept them next time, which will allow them to benefit from tracking you. It's a net win

If turning off cookies is a time-wasting chore, you are more likely to accept them next time, which will allow them to benefit from tracking you. It's a net win as long as the benefit they extract from the people that get tired and accept tracking is bigger than the loss from the people that bounce. The "beauty" of it is that so many websites in the internet are doing it, that even if it's your first time going to a website, when you see the cookie popup you already know the drill and are primed to just accept everything.