The only thing irrelevant is how long Love had the ball when his team put up a 115 offensive rating and couldn't stop an AAU team. Still waiting on you to explain how Love getting the ball more against bad matchups improves that defense.
It was actually a 111 ORTG, but hey, who's counting. In fact, if you looked at their ORTGs on a game-to-game basis, you'd see a difference:
Game 1 - Cavs had a 89 ORTG
Game 2 - Cavs had a 105 ORTG
Game 3 - Cavs had a 109 ORTG
Game 4 - Cavs had 123 ORTG
Game 5 - Cavs had a 118 ORTG (which is slightly affected by the garbage points they scored near the end)
Basically, apart from the anomaly Game 4 performance (which was heavily influenced by the refs), they really weren't that great on the offensive end. They simply made the most out of the pace of the game, at the expense of their defense.
To expand on that -
And you've gotta be "dumb as hell" to believe it's as simple as what you're making it out to be. The Cavs do have a great offense, ATG even, except they did have problems offensively. They were scoring a ton of points because of the pace [103.4] and expending most of their energy by trying to keep up with the Warriors offense, because that was the best way to give themselves a fighting chance. In the attempt of trying to fight fire with fire, the adverse effects of Bron ball reared its ugly head:
LeBron exhausting himself on offense and leaving little to no energy for defense, forcing lesser defenders to pick up the slack
Cavs' supporting cast less engaged and out of rhythm due to not getting regular, consistent touches, leading to them producing inconsistent offensive performances
Offense becoming too predictable - Kerr's gameplan was to let Kyrie and LeBron go 1v1 and live with the consequences because he knew they'd tire out eventually and it would nullify the Cavs 3-pt shooting.
Offensive-based players were reduced to lesser roles and forced to carry the team defensively, which led to an imbalance on both ends
This is the problem when you take things at face value, you can't see shyt for what it is.
If they balanced the offensive load evenly throughout the rotation in relation to each player's abilities/skillsets, players like LeBron (who are one of their strongest defensive players) would've had more energy on defense. They didn't need him to suffocate their possession count, because they have enough offensive talent to shoulder the load equally, what they really needed was LeBron's efforts on defense, because like it's known they don't have too many strong defensive players.
It's all about finding a balance in accordance to your personnel and playing to your team's strengths. The Cavs didn't do that.