How come we never see anyone say you should or must lap the lugs of Carbine bolts?

I'm fitting a different (flat) bolt to my Carbine, one of the last things I did just for giggles was to coat the lugs with a magic marker, install it and run ten dummy rounds through the rifle by hand, I did this twice and then checked the bolt. I found the left (small) lug is showing very little contact, in fact hardly any at all. I had checked the round bolt I have been using since I built the rifle and that has good contact on both lugs. So now I'm wondering, is there any benefit to lapping a bolt for the little .30 Carbine cartridge? Is there a reason why bolts are not or shouldn't be lapped on a Carbine?

I was going to ask Larry..... seeing how he knows everything. I bet he has a PDF instruction sheet on how to do it. Ha!!