RvN started his international career late and had a long-term injury at PSV. That probably affected his international record. Also, I believe at that time the NL national team had a Ajax bias, rightfully or not, so Kluivert was pretty much first choice. Back then their regular starting XI was a Ajax core, players like van der Sar, the de Boer bros, Seedorf, Davids, Overmars, Kluivert.
Besides Huntelaar with 34 goals in 59 games, the next closest is van Persie with 31 in 71. RvP without doubt the better player and imo with a higher chance of breaking that record, but I'll so hate it if that twut becomes their leading goalscorer of all time.