Sure, but I'd take an attacking unit who you can expect to get 10-15 goals a season each, over a striker you can expect to get 30 on his own. For one simple reason - the variety in the attack then gets the whole team up the field and you get more goals from midfield, and you control a game better.
Don't get me wrong, if we could have "Bournemouth" Lukaku most weeks, he'd be sensational and I'd be urging Everton to throw £300k a week at him if need be, just get him to sign. But we don't - we don't even get close to that most weeks from Lukaku, and that's the issue.
My view, to use the analogy of this thread, is at the moment we have a "bazooka" attack - one big massive killer weapon that is too easy to dodge. I'd prefer a "machine gun" attack with bullets peppering in from all angles; much harder to avoid.