I've used magic eraser on plenty of playfields and didn't have that problem. And others where I did... but I knew that going in. The trick is to go slow and stop before you start pulling up paint. Obviously in areas that already have loose paint or clear coat that's been worn through you're going to have to be even more careful and might remove some paint but it's not like paint comes off the second the pad touches the playfield. Areas like that will often lose paint with any cleaning.
In this case I would be careful with it. The paint looks pretty loose but it might be the dust making it look like that.
I would strip the playfield, remove the dust and surface dirt (could use Novus #2), go over it carefully with magic eraser, clean with Novus #2, wax and reassemble. It might not come out perfect but I can guarantee that I could make the playfield look better with this method than Novus #2 alone and remove no paint.
Magic eraser IS abrasive. But it's a very fine abrasive. You have to respect it or it will bite you in the ass.