system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why didn’t Snape just brew Malfoy some liquid luck?

Since snape and malfoy were working together, why didn’t Malfoy just ask if he could have a vial of felix felicis? Snape is certainly talented enough to make it since he’s one of the best potion masters in the world. If he just brewed some then Malfoy’s objective would’ve been completed correctly. Is there a reason why Snape wouldn’t be able to do it?
gpt
Because if Snape gave him liquid luck, he might succeed at killing Dumbledore. After all, most of his plans were to randomly throw dangerous items around in the hope that Dumbledore picked them up, so liquid luck would presumably be even more powerful as its a purely luck-based situation.

This would mess up Snape's *actual* plan, which includes killing Dumbledore himself. Luckily, he's got several excuses (maybe its got several rare ingredients it will be hard to get stealthily, maybe it'll be pretty obvious who brewed the luck potion when the assassin shows freakish luck, etc) to get out of it without playing his hand.