Please make clear distinction what you are referring to - BG3 or DnD rules.
BTW - I fully support Clerics being held up to same - or higher - standard than Paladins. In both BG3 and DnD

If you worship Shar/Gruumsh/Lolth/Vlaakit/etc. and give Scratch a scratch - instead of kicking the flea ridden mutt - then no spells for you today, HERETIC!