Originally posted by ODGThanos allowed it. Also upgrades
^ If Thanos doesn't allow it (as in he defends himself), it ain't happening. Then again, that doesn't necessarily mean Thanos actually weakened his own durability to let it happen.It's one thing to point and laugh about it being PIS. It's another to find an attenuated in-story reason for it that isn't even so much as hinted within the four corners of that comic.
If I had as high an estimation of Thanos' piercing durability as you, I would find this explanation to be arguable though.
Thanos faired better than adamantium and Cap's shield against similar attacks, and vastly more powerful attacks. Thanos > Adamantium