I guess the question is, could Luffy block hakai like Zoro did for whatever duration, and then proceed to launch his own offensive like Zoro did?
And the only way to tell is if both were put in the same situation. As it stands, there is no means for comparison.
I don't think Luffy could block hakai like Zoro did, because his defense isn't as effective, endurance isn't even the biggest factor there. (But if you transferred the damage Zoro took from that attack to Luffy, would Luffy still be able to fight like Zoro? That's a different question, or if Zoro took ragnarok the same way Luffy did, and reacted differently, then we can talk about proving something)
These guys are just deflecting from real point which is based on endurance. Is Zoro enduring the Hakai damage a better endurance feat than Luffy getting knocked out by Ragnarok? It clearly is.
Again, pointless comparison. Sure you can call it a better endurance feat, Luffy got KOd after all.
But Zoro blocking hakai and enduring its effect on his body, doesn't guarantee he wouldn't get knocked out if he took Ragnarok clean. You need to stop comparing the two situations and just say Zoro had the best endurance feat on the rooftop and leave it at that.