PSG was not lucky enough playing Dortmund in both first and second leg, because assuming those balls that hit the bar of the goal post were goals, we will not be seeing Dortmund in the finals, but as luck is involved in all games, that was what brought Dortmund to the finals.
When it comes to luck, I think that Real Madrid are more lucky than Dortmund since football history, and when it comes to quality football, I believe that Real Madrid has it more than Dortmund, also when it comes to quality players, they have it all. This is why I don't think that there will be any magic that will make Dortmund win Real Madrid.
Like seriously the numerous times the ball hit the wood work of Borussia Dortmund was really a frustrating moment for PSG making it looked like all their efforts were in vain but I don't think Borussia Dortmund won out of luck because they won PSG both home and away so if they were lucky is the first leg what about the second leg? Dortmund literally worked so hard to reach the finals despite that luck was included but yet they really played very well and they made it to the finals.
Real Madrid have the highest records in Champions league history so they are not just lucky because they made the UEFA Champions league their priority that is why they were able to achieve that however, regardless of the fact that Real Madrid is stronger than Borussia Dortmund, but they won't have an easy win and let us not forget that Borussia Dortmund is where most of the professional players we have now was blended, the likes of Erling Haaland and others were developed in Borussia Dortmund so let's not underestimate what they can do in the finals as table might turn to their favour if Real Madrid is not careful with them because how they were able to win Atletico Madrid and PSG is enough to have an insight of what this team have become recently.