As others have said, I tend to subscribe to the belief that you are what your record is. So the answer to OP's question is yes.
Have they gotten lucky? Not really. Their pythagorean record is 58-41, only one game off of their actual record.
Do they have as much "on paper" talent as their competition? I would say no. Certainly not compared with LA. But injuries and underperformance is what it is.
Do they have the talent to be the #1 team in MLB after 162? I certainly think so and it seems like many here do as well. I agree that you have to add talent at the deadline to keep up with the competition. I don't think they will trade away major league talent even though they are in a rare position of having surplus.
If they are going to add and not get into bidding wars, I would add vets who have been on multiple deep postseason runs. That's one area we are lacking relative to some of the teams that we may be going up against in October.