@javislife1998 It won’t necessarily “hurt” you in regards to the application process, but it won’t help you either. The professor will most likely be uninterested because you aren’t a student. If you got accepted, he will be interested in maintaining connections, but he will not have any influence on the application process.
If you’re curious about opportunities for undergrads, you should talk to a representative or alumni instead. The professor probably receives hundreds emails from enrolled students every week, he won’t be interested in communicating with a stranger.