I am not sure that Real Madrid can also constantly make heroic comebacks on order, so I still think that the club should not bring the situation to such a state

For me personally, at this point in time, before the first match is held, both Chelsea and Real Madrid have the same chances of success following the results of two matches. In any case, despite the cancellation of the away goal advantage rule, there is still a home field factor, and it is desirable for Chelsea to make some margin of safety before the return match and try to win, because Real Madrid at their home stadium with the crazy support of their fans will in any case play to win and is really capable of transformation.
the most important thing now for Chelsea is to keep winning. The first leg playing at home will certainly be more energy for Chelsea. although it was difficult Chelsea had to get the winning goal. and I hope in the second leg they don't play defensively to stem Real Madrid. instead of aiming for a draw.
Madrid with Benzema's recovery can certainly damage Chelsea's defense and midfield dominance. they have to be careful.