Because getting on the inside is 100 times harder than fighting on the outside, not to mention Eddie was still outmatched there. Conor is just a much better boxer, with better footwork (much more important than length as DC showed) and that's not a knock on Eddie. Eddie is a more refined and athletic boxer than Stipe, and I agree Stipe is the best at HW. Wilder outside maybe Joshua is also the best boxer period at HW, but compare him to Canelo and it's night and day. Same rule for Stipe.
After watching the fight, it's clear DC was much faster than Stipe anyways, and a smarter boxer. That's not to say it wasn't impressive, but KOs, especially in the HW division can't EVER be compared to the difficulty of submitting someone, especially someone who is notoriously difficult to do so.
DCs a great fighter regardless of weight class, but like I said previously, he's fighting in divisions where Latifi, Blanch, Lewis, and Ngannou are among the best. He's 40 years old, and clearly not in the best shape he could be in, and people forget...is still fairly young in MMA terms. A lot of these "Achievements" show what he could've been under the right circumstances, but the reality is they havn't been the best of circumstances and that goes to show just how disturbing a goat debate with him included is.