Many games left means there is higher chance for them to gain more points but at the same time there is also higher chance for them to lose more points than their competitors. Looking at the chance, Serie-A gives them better chance than in Champions League as their first play-off match is against Liverpool. It is not an ideal situation for Inter obviously because they have many hard matches this year and the matches are all important for them. I hope Simone Inzaghi will be able to manage his team in both physic and mental.
Matches mean opportunities to pursuit points and targets, Scudetto, Champions League zone, Europa League zone. Good teams will earn more points and expand difference to worse teams. Inter Milan are doing so impressively and they have enough confidence to protect their trophy which has been reflected on many of their matches.
The fundamental characteristic of a champion is being able to score goals to get 1 point or winning goal to get 3 points in very late minutes. It's exactly what Inter Milan have performed so far in this season. In addition, they are able to do dawn raids in order to have early advantage and go towards final win. They did it in the latest match against AS Roma in Coppa Italia. Even Roma managed to come back with some opportunities, Inter Milan protect their advantage very well and their defense is solid.