Dude, Dortmund could reach the final UCL last season with big efforts. It was not a luck, I hate if someone stated they were only lucky to play in the final. Dortmund reached the final after they won some matches, they didn't jump to the final by winning a single match only. If Dortmund won in a single match, I can agree it is luck. But if they won the matches many times, it is surely not a luck but it is the quality of their game.
Dortmund of course they do have extraordinary strength and I agree with you that Dortmund can get to the final of course not because of luck. but in my personal opinion Dortmund's strength and performance are indeed good and of course we saw Dortmund successfully beat PSG in the UCL semifinals in the 1st leg and 2nd leg of course this really proves that Dortmund is a good team that has a strong defense and of course I do too saw how difficult it was for PSG to break through Dortmund's defense during the semifinal match. So now it's clear that in my personal opinion the same is true, namely Dortmund not because of luck in advancing to the final but because of the quality and results of their hard work.
but of course in the coming season, Dortmund will definitely try as hard as possible to win a trophy in the UCL even though the competition is very tight and of course Dortmund will definitely have the potential to become a strong team again in the UCL, yes, even though Real Madrid's squad is getting stronger, of course Dortmund will definitely fight to be even better than the season that just ended.