An open source project like wlroots is a massive labor of love, and it becomes part of ones identity. You're in essence asking Drew to abandon it. In other words, you're asking him to rip out part of his soul.
The nature of FOSS is that you don't get to decide what people do with what you build after you give it to them. Nobody's asking him to abandon it, only to acknowledge that people are going to use it, even people he doesn't like, for projects, even projects he doesn't like. If not being able to tell people how to act while using your software is a deal breaker, FOSS isn't for you, you probably want a ToS instead.
How is Drew supposed to make wlroots better without participating in the community of wlroots' users? And improvements come from looking at all uses and generalizing across them rather than looking at a subset. If he ignores HyperLand and makes a change that impairs Hyprlands' usage of wlroots, the HyprLand community will very loudly show up in the wlroots issue trackers, etc.