No team reaches the Champions League final by chance or luck. Every team in the final is there because of its qualities, and no Champions League finalist should ever be underestimated.
Manchester City made that mistake a few years ago in the final against Chelsea and I don't think it will happen again.
Inter showed that they have a very good defense and if they manage to withstand the initial attacks and the pressure of Manchester City, as the match goes towards the end, their chances of winning will increase.
I believe that a very interesting and uncertain final awaits us.
Maybe it was very painful for Manchester City because they had to lose to Chelsea, even though it was one step away from the final match, Manchester City could lift its first trophy in this competition. But I think it has to be a lesson learned and Manchester City can't have the same experience in this season's final.
Against Inter will definitely be quite a tough job for manchester city because one of them is like you said that inter has a strong defense and even though manchester city is favored to win, still football goes on for 90 minutes, anything is still possible. Especially if Inter succeeds in holding back the onslaught of attacks from Manchester City, maybe Inter can at least bring it to extra time or even a penalty shootout. But this is just speculation, the real results will be seen in the match in a few weeks.