Where we agree is there's a problem when you have lots of images, but I don't want stuff lying around in expectation of doing more than one ingestion. I cull the 500+ as far as possible, then get them into LR and maybe apply keywords etc - in batches so little wasted time. If I then think it'll be faster to use PM for more culling, then I'll do so and update LR with Folder > Sync.