Hi, Renee.
If you have your events slug set to “events” and also have a WordPress page set to have “events” as its slug, you’ll get a wp-admin notice letting you know of this conflict and that the events archive page will win.
I am unsure how it’d work for that page’s child pages, but you might want to give it a try.
Generally, though, I’d recommend against it in case of any rewrite rules or slug conflicts that might happen in the future.
We do have Community Events which would allow your site users to post their own events to your site’s calendar. That “add new event” page (not quite a page) is at /events/community/add by default.
Please let me know if you have any follow-up questions on this topic.