The reasoning I've heard is that a lot of luthiers and shops are worried about the end block failing, but in my mind having a straight endpin with the tailgut attached to it would put more strain on the block than a Laborie endpin would. I may be completely wrong, but those are just my musings.
Who knows? I had a buddy who cracked his bass after he bumped his bass into a plastic garbage can.
Eight years ago my bass got knocked over on its face because someone's pant leg got caught on the endpin. Made a terrrrrible noise and somehow there was no damage other than a little ding on the bridge.
The drilled Laborie endpin has some upsides, but its great to have options too. Everybody's different. My endpin won't be appropriate for everybody, but it really works well for some people so I'm glad to have it out there.