I would support that.
Maybe an idea for a new feature though to actually also allow recommendations. Not something you add to a list, but if you’ve watched something, give the option to add a recommendation to something you also watched. And also add a comment about that why someone who would enjoy the item you just watched, would also like this other show or movie you’ve seen in the past.
Like what myanimelist.net and anidb.net offer, example:
lifeiscrazy's Profile - Recommendations - MyAnimeList.net