I have been reading g a lot on how to ship reptiles. Seems it is 50/50 for punching holes in the box. I realize what the premise is for the holes, but is it really necessary?

I shipped tropical fish for over 20 years using uniheat 40 hr. heat packs ( when needed) and never punched holes in the shipping box. Shipped most of the year except weather below 32.

Please no flaming, just curious.