That might be true, but do you realize that Dortmund has now proven a couple of times that they can beat top teams? With some luck and on a perfect day I think they can beat Real Madrid. Just see how they managed to stop Mbappe from scoring two games in a row. I guess there is hardly a harder challenge than that. If they can stop Mbappe, they can also stop players like Vinicius Junior. And in a final I think everything is different anyway. Every player reaches new heights and there are so many small details that can be decisive. If Real Madrid doesn't score way too early in the game, then chances are good for Dortmund to achieve something great
When 2 teams go to the final it means they are the best team among the other teams and basically both teams are at the same level, the only difference is experience. Indeed, based on the squad, Real Madrid looks better, but there is no guarantee that Real Madrid will definitely win, the Europa League final is an example when a strong team like Leverkusen is defeated so the same thing could happen in the Champions League, right?
As such we have to accept that the two teams who finally qualify for the Champions League final are definitely strong but I would add one more point that Real Madrid qualified for the final based on their performance but Dortmund are very lucky with their performance. Dortmund were a bit lucky because they had easy opponents from the group stage matches and their opponents were easy until the semi-finals which is why they took advantage of that opportunity to qualify for the finals. As easy as they were to get to the semi-finals, the journey to the final match will not be easy for them as their opponents in the final, Real Madrid, beat tougher teams including Manchester City and Bayern Munich to qualify for the Champions League final. So it is expected that Dortmund will not be able to compete against Real Madrid in the final match.