For the complaint to make any sense in the first place there needs to be an expected alternative way to go back to the beginning and end of a line. Otherwise it would be "it took me maybe 15 years to get used to being able to go to the beginning or end of a line in one keystroke". The two such options I'm aware of are Home/End (on macbooks I believe that is Fn+arrow keys) and Ctrl-a/Ctrl-e.
What alternative key combinations do you expect to work for the purpose?
What alternative key combinations do you expect to work for the purpose?