Thanks for the corrections. That does make it a bit more powerful. But really, what other targetted spell in the game doesn't require LOS? That has to be deliberate.
I think in general, single target spells that don't fire a ray don't require a "line of cast" in BG3 (which isn't exactly correct in PnP).
So you're looking at things like Hex, Blindness, Sacred Flame, etc.
Magic missile by PnP rules would've fit in this territory, but Larian decided to implement it as a ray spell with a weird curve.