Your entire argument boils down to the fact that it's hard to view git blames. It's not.
As stated by other people, IDEs like VSCode and IntelliJ do an extremely good job of showing the blame. And they DO show the entire commit, body and everything at once.
A simple experiment would be to have someone else write down a number on a piece of paper while you weren't in that room, have you do your OBE thingy and then accurately tell that number several times.
As stated by other people, IDEs like VSCode and IntelliJ do an extremely good job of showing the blame. And they DO show the entire commit, body and everything at once.