Yeah, because our opponents have failed to convert opportunities at an immense rate. Our xGA ranks us as one of the worse teams in the league.
No, it wouldn't. It's right in the middle of the pack and being better than bottom half teams is hardly anything to shout about (and we are actually worse than Everton and Brentford even).
As for fit striker, Hojlund has started 20 out of 28 games this season, we have had our wingers available almost without fail, Bruno has been around all season. If anything we've been quite lucky with injuries among our offensive players.