Nah you've thought about it in the wrong way. What's happened is that for an elite side he basically brings the whole team down to a lower level because he breaks how the unit attacks.
So take yesterday as an example - because Lukaku is so unbelievably awful with his first touch and general team play, United had no choice but to sit deep and take pressure because they had no outball.
That's why he's not an elite level player. He's the opposite of it - he actually hurts a team that tries to play football. He's suited to a side who exclusively counter, which is why with West Brom and his first year with us he was unstoppable. The very minute we tried to impose a footballing game on the league under Martinez instead of a counter attack system, he fell apart and his weaknesses where there for all to see.
If United have any sense, against any half-decent opposition now they'll be playing Ibrahimovic, or even Rashford - anyone but Lukaku. Lukaku is only a viable weapon where the opposition shat themselves and sit deep from the first whistle so the team as a whole don't need Lukaku to get into the final third as the opponent gifts it to them regardless.