Indeed. Basically, both Real Madrid and Dortmund have the same chance to win the final UCL match.
Between two teams in a final match, there is always a stronger team, a weaker team so their chance to win the match is not 50/50, that is the odds for only two equal teams in quality and strength.
In this coming final match, Real Madrid are stronger than Dortmund and they are even much more experienced in Champions League generally and in Champions League final match in particular. This makes the odds of winning the final for Real Madrid is higher than the odds for Dortmund.
I think people assume Real Madrid should win against Dortmund because they consider the stats of Real Madrid in the final UCL match. Honestly, Real Madrid stats looks very convincing, they really understand how to deal with the final UCL match. I think it is not only about the tactics and the quality of the players, it is also about the mentality and the experience.
I think so too but I guess Dortmund will not give Real Madrid an easy final match. It will be a tough battle for both and Dortmund shown that they are not a weak team in quality and in mentality too. They maintained their clean sheet in two semi final matches against PSG even they had to face with considerable attacking pressure from PSG in both matches.