Sword of Spirit
Legend
In the case of 5e it's just choosing natural language over jargon - also why it uses 'hit' in a sentence instead of having an effect line or some such.
Except in this case, many spells say "creature" and many say "target." I don't think they were just sloppy or goofed on all of those, since the wording of the rest of the game is more consistently precise (by 5e standards). I'm pretty sure creature is intended to mean only creature. The why's are still mysterious. I'm sure it isn't about game balance.