Regardless of PSG's current performance, are we really not allowed to support Chelsea in this match?
I think in this context, it's perfectly acceptable to support Chelsea, even though PSG are the favorites in this match. I'm aware of PSG's current superior performance, but should we underestimate Chelsea as if this match will end without a fight? The match isn't that easy, even though PSG are strong and favored, but that doesn't mean Chelsea doesn't have a chance now. The situation is still there, even though Chelsea's probabilities are below PSG's right now.
Don't let your confidence build as if you already know what tomorrow will bring. If your view of PSG is too high (although it's appropriate for now), I don't dare consider the worst-case scenario of Chelsea winning this match, because you can be sure how those who have long believed PSG will be champions will react.
I think Real were better prepared to face PSG, but they failed defensively, so Chelsea can take note of that and try to play better at the back. Although it is extremely difficult to hold off PSG’s attack right now, and I am sure PSG will score. A PSG win in the final would be a logical conclusion to a good season, and I believe no one doubts now that they will rightfully be considered the strongest team, while Chelsea are far from their optimal form.