Same concept as 'natural' makeup: while it's obvious that there's polish if you know what nail polish looks like, it just looks like better looking natural nails to the untrained eye. It's just base coat and matte top coat. It's become my go-to for when I'm not feeling any colour or design. Looks better than my naked nails and I get the benefit of having them protected from water, so they don't split as much.
I was so ready to make a Polish polish dad joke.