Goro was the physically strongest fighter we saw, and nothing he did is anywhere close to Luke's peak. A wooden barn collapsing on him slowed him down for a few seconds, and he could only dent the hood of an old beater pickup truck with an axe. His greatest feats are shrugging off the rubble of the barn, stopping the truck, and ripping the door off aside from slinging Cole around. The best Jax did was turn Reiko's head into pulp.
Meanwhile Luke is crushing the front end of a speeding SUV going much faster and farther than the truck without moving an inch. And that's before his upgrades.
https://imgur.com/Ly6xJNf
https://imgur.com/u1jRwUa - Jumps out of at least a 6th story window, cracks the concrete and just runs off.
This isn't a fight Luke can lose, even if he tries.