yea, but tbh you have no idea how much talent one person may have. Someone could be gifted musically, creatively, competitively, and academically, and no matter what they choose, they'd have to either waste talent or be quite busy lol
Yeah, music is much more difficult than ppl think (especially classical) and singing gets much harder if undeveloped properly). And yes, music theory is pretty essential. However some classical composers like mozart and Beethoven liked to break all the rules so it's interesting to learn the theories behind the exceptions, which makes the topic even more difficult lol