I don’t think we should feel a “need” to like everything. Thing is, those little ❤s are how stories spread and gain visibility here. That’s not my choice or yours, it’s simply how this place is built.
So if you take an hour (or 3) to compose and edit a story, and I read and like it, it costs me nothing to click the ❤ and help spread your work. Not so much that I feel a “need” but that it’s a small thing I can do to help get visibility for someone else’s work if I enjoyed it.