Using a card scraper on it's own is inherently difficult because there's no sole to reference from. This makes it tricky to start the cut at an edge without juddering, and to finish the cut on an edge without diving over and dubbing the arris. If you've spent hundreds of hours using a card scraper you might get away with it, if you haven't then you almost certainly won't.
So, imagine you've just made a table top with cross grain banding and some delicate inlay, you've sunk 40 or 50 hours into the top alone, and now you need to flush it all off and make it ready for finishing. Would a professional reach for a card scraper or something else? It's a banker's bet they'd reach for something else, most likely a Stanley 80 because it's cheap, reliable, and those critical few inches of sole take away the risk of a horrible and expensive cock-up.
Keep the card scraper for localised jobs and curved work, for full surface finishing get an 80, a good random orbital sander with an ultra hard sole plate, or learn to plane with the cap iron set really close.
The fancy Lie Nielsen scraper planes are seductive tools, but IMO as a user they're more trouble than they're worth. It takes far longer to re-sharpen a Lie Nielsen scraper plane blade than the card scraper style blade in an 80, you can't control the camber as easily as you can with an 80, and you'll have to spend quite some time fiddling around with the angles on a Lie Nielsen scraper plane to suit the timber (hint, the LN user manual is pretty dubious in this respect).
Just my 2p's worth.