Because i might want cookies on this page, gmail and reddit, and nowhere else. This would mean me starting a private window, googling something, finding a link

Because i might want cookies on this page, gmail and reddit, and nowhere else. This would mean me starting a private window, googling something, finding a link on reddit, opening it, either logging in again, or copying the link to a non-private window, commenting, closing that window, and back to search results.