Dreamy is correct.
What he's trying to articulate is that when we don't play very well and/or are faced with a resolute defensive wall of players, we could do with more inspiration when the perspiration fails. There are times when you just have to hope that your match-winner, your genius, your goalscorer simply bails you out.
It's a hoary old cliche, but the reason it is one, is because it's fucking correct: great teams win even when they don't play well (or when they've been simply outplayed)
Often it's a goal scored from the one chance the team has created. Or one astonishing bit of skill. When we don't play well, we very rarely win.
And we aren't very clinical, because, as everyone knows, we don't have any top quality finishers (bar Sturridge, who seems a shadow of the player he was). We need lots of chances to score. And they've dried up.
Dreamy keeps referring to Chelsea, using Costa and Hazard as the two type of players he is talking about, and it is again, entirely correct. A brutally efficient goalscorer and a devastatingly quick attacking wizard who can create his own chances without any help.
The closest we have to Hazard is Mane. Without him, as most of us predicted, we've been fucking shite. So we need another. And we also need another striker, who is a top quality finisher and can work as a lone striker.
When we struggle in a game, we don't have enough (or any) players like Costa, Hazard, Aguero, Sanchez, Dele Alli, Sanchez, Kane or Ibrahimovic.
Firstly, the point you're making is not the point Dreamy is making. I get that you're better at articulating a point than him, but his argument isn't yours.
"we don't have someone who can create something out of nothing" was his original point. Which is arse. He's since dragged that into 8 different points about dogged defences (which we've scored against), team that sit deep (again), and Chelsea (whom we've beaten, and scored more than). This has been his forum modus operandi for 10 years; ridiculous opinion gets booted around, then he drags it into anything resembling a point. Usually far removed from his original one.
Even your argument has holes aplenty. We don't have a Costa or Hazard. Great. They don't have the goals we do from midfield. It's all swings and roundabouts.
The reason we're not top of the league - not that I think it's a point worth worrying about that much, given we've completely exceeded all expectations this season - is that we concede too many, not that we don't have players capable of 'unlocking defences'. Certainly, the latter is not the major contributor to us being 2nd.
2 against Burnley, 4 against Bournemouth, 2 against Sunderland, 2 against West Ham, 2 against Crystal Palace. You cannot expect to have to score 3, 4, or 5 goals to need to win games.