Adobe is a virus. You cannot get rid of it. I have an old payment subscription at them that I cannot cancel even after calling the bank. You can't veen close it from the process list without sacrificing 2 hours.
Yup. Last time I installed an Adobe app on a Mac it refused to install unless I entered an administrator password (and didn't describe why that was necessary), and then made itself persistent so that the Creative Cloud background process restarted whenever I rebooted the computer. Ended up downloading KnockKnock to figure out how it was persisting itself: https://objective-see.org/products/knockknock.html
It's been a while since I used it.
Most of the time when mac installers require an admin password, it's due to a combination of incompetence and malice.
Very frequently I will just unpack installer bundles by hand and drag things where they need to go. No admin password required, and when it is actually required for some functionality, it's usually something really stupid that could have been done differently. E.g. a common one is to install a startup item that boots a background task when you start your computer, but they could just as easily have booted the background task when you launched the app.
This happened to me with savethechildren.org before they allowed for easy cancelation. In the past you would have needed to call to cancel.
This is solid as a convenience to the cardholder. When there's fraudulent activity and the card needs to be reissued with a new number, it's not as painful to update all of the subscription services. Most cardholders, most of the time, would prefer the impact to be as minimal as possible when issued a new card number.