Parent comment was pointing out that you pick what instance you use and there are a lot to choose from, so they tend to be fairly homogenous in views (exception being the largest few)
Especially when you're the only one posting. At some point, it feels a little like you're spamming the sub, even if you are the only one keeping it active.
The "mall" analogy works for Reddit because the point of it existing is to buy things there. Lemmy instances and communities only exist because people want to make space for conversation. If spaces are empty, I see that as a sign that someone, somewhere cares so much that they will happy build the space and wait for others to arrive.