You are basically only giving them an option to respond OR zap, which they are zapping, but are receiving ‘likes’ instead. It would make me feel like it’s unfair and I would consider leaving nostr.
Discussion
You don’t have to enable it… nothing has changed for most users. This is for a select few users who prefer not to use likes.
Maybe if you give onlyzappers the option to toggle the features on their posts to remove or have the like button on the post for others to either onlyzap/respond or all options
The feature as implemented today ONLY changes the view for the user who enabled OnlyZaps. Nobody else sees any change and can still like their posts.