You might not think it’s possible, but anyone can learn how to sing higher notes. It is not just an activity reserved for superstars.
Learning how to sing higher notes is very important, if you want to sing like a pro. If you want to be able to sing any song you want, it is important to increase your vocal range (the range of notes you can comfortably sing), after all. It is certainly possible for you to have trouble singing low notes, but most people have the most trouble when they try to sing higher notes.