My boyfriend was using Pixelfed for months before he found out about the local/network timelines.
He doesn't understand the point, and told me I should make it easier to discover accounts and content.
Not everyone uses these platforms the same, and I wouldn't be surprised if most people never check local or network timelines.
Anyways, its not really fair to compare Mastodon and Pixelfed since they are very different.
Wish all the best for the new app and the existing vibrant ecosystem of 3rd party apps!