I can tell ya, as a casual astrologer, that we don't care much if the planets are considered actual planets by scientific standards, as they represent the same symbolic things either way~ Honestly it is just easier for us 😅 You'll see the Sun and the Moon refered to as "planets"---no astrologer actually believes that they're planets, it's just so much easier to use that word instead of saying "objects in the solar system" every time!