Well, one of the things with metal strings is that they are heavier, and with the reduced length of the neck, may need less tension.
It may be true that roundwound strings would eat the fretboard.
Same is on my Squier Vintage Jazz bass, which also has a plastic fretboard.
However the damage there is only very little, and cosmetic, just like would be on a wooden fretboard of a fretless bass.
Some users had suggested to put flatwounds on them, but then it's sound would be more like an upright, and less flexible!
Just exploring possibilities... Not that I would do any of that, because flatwounds are not my style of strings; just wondering if the ball end would fit on the bridge.