Most people are anti-email open tracking because, ya know, it’s a violation of privacy that the recipient didn’t opt in to and it’s weird and creepy (literally everyone I know turns off read receipts on text messages). Extra creepy when it tries to geolocate the open.
But hey it can also be embarrassing to show the sender how absolutely immediately you open the email…
… and then how many times after.
Don’t judge me I just have to read an email 15 times before I can respond to it.