If I am following the discussion correctly, the general talking point (no pun intended) was/is whether or not the katar (or other stabbing weapons) needed a reinforced point to effectively penetrate armor.....that is mail.
While the pragmatic digressions are interesting, as are the philosophical perspectives......I would say again, it seems that bolstering the point of an edged weapon would make sense if at any point (there I go again
...the weapon would be used in a thrust vs. armor or heavy clothing.
While the katar in most instances, especially early examples in the south (Vijayanagara etc, Maratha etc.) were used in slashing cuts....their use to the north began such bolstering as mail was often present in combat.
In studies on mail used in New Spain in colonial times from the conquistadors through 19th century, it seems that this defensive armor was in use even after it had become largely obsolete in Europe with the advent of firearms. However, lack of proper armorers to maintain and repair the old coats of mail led to its becoming unserviceable in time with corrosion and breakage.
The biggest problem was its lack of effectiveness again the deadly arrows of the American Indian tribes. The 'point' of the arrow would enter the ring of the link, and expand it and break in, especially with the force of the arrow vs. a compromised (rusty or broken) link. Further and worse, the debris was carried by the arrow into the wound, with obvious result.
These dynamics are what I was referring to earlier regarding how effective a katar would be vs. mail, and how the reinforced point would react in a thrust. However, if the mail was sturdy and sound, relatively new or well maintained, the result would not be favorable for the user of the katar.
In the more probable case, with heavy or padded clothing, a sharp reinforced point would certainly penetrate with effect. With these circumstances in mind, the reinforced point would not necessarily be intended against armor, but vs heavy clothing as well.
The use of mail prevailed in archaic situations into the 20th century (Khevsurs ) and through the 19th (in Egypt with the Khedive's 'iron men') and across the Sahara in Bornu and with many tribal groups. In most cases, it was readily discarded as the dramatically increased wounding from bullets were obvious incentive to do so.