Actually that is more of a reason to have auto posting as I don't spend most of my time there - I mostly just reply to comments. I'd prefer not to have to go there, especially to do manual posts, and posting from Nostr could mean full length posts (not seen yet how it comes out on the other side).
I've also noticed that adding link embeds to Bluesky posts is a real pain via API - you need to specify the starting and ending character numbers for the link. This is pretty unbelievable. Most social networks will pick that up. So I have auto-posting setup, but without link embeds they really don't look usable.