That happens on inexpensive nibs which lack iridium (or some similar metal/alloy) tipping.
A tipped fountain pen will be incredibly resistant to wear --- while I did significantly wear down the inexpensive Platignum (British brand, but despite the name untipped steel) fountain pen I had when I was younger after a couple of decades, when I finally switched to using more expensive pens with nibs for tipping, haven't had to replace a nib since.
That happens on inexpensive nibs which lack iridium (or some similar metal/alloy) tipping.
A tipped fountain pen will be incredibly resistant to wear --- while I did significantly wear down the inexpensive Platignum (British brand, but despite the name untipped steel) fountain pen I had when I was younger after a couple of decades, when I finally switched to using more expensive pens with nibs for tipping, haven't had to replace a nib since.