It's only the strongest and best team in this competition that deserves winning the league and Arsenal does not have that quality of winning PSG because they lack a sharp striker. Inter is desperate to win the Champions League this season and only luck can make PSG win them in the finals because Inter is stronger than them.
When both teams have no experience in the Champions League meet, the quality and strategy of the coach is enough to determine the final step and that was proven by how Arsenal failed to take advantage of the opportunity to beat PSG in the two matches that took place. On the one hand, the absence of a sharp striker did not have a big impact because previously they managed to beat Real Madrid but the final finish when facing PSG did not look so good for Arsenal.
PSG are much more prepared than Arsenal and I admit the quality of PSG players is much better because they are able to deal with pressure even though their path to the final is not as easy as imagined and even before they were not at all favored to qualify for the final round like now.