If Inter do not want to be left too far or want to shift the top position of the current standings, at least Inter must score 3 scores to win. Seeing the current condition Torino is far worse than before and I agree with you if Inter win looks guaranteed. And related to a comfortable betting option for me will prefer under 3 or under 3.5. I'm sure Torino will not be able to break into Inter defense and my prediction might end 2-0 or 3-0
Looking at the Serie A games that played over the weekend, the goals of each of the matches are below 3 goals but we can't say that Inter Milan match against Torino will also end with less than 3 goals because despite that Inter Milan have not scored more than 2 goals since they after they played 3:3 against Barcelona in the UCL, but i feel like they might score more than two goals tonight because Torino is one weak team that has a porous defense such that Inter Milan strikers can easily break through and on the other hand, Inter Milan also has an unstable defense which there is every possibility that they might concede so am seeing the match to end above 3 goals so the option of under 3 or under 3.5 may not work as you predicted instead the best option will be over 1.5 because there is no way that the match won't produce more than one goal. However, the most important thing is for Inter Milan to win Torino, it does not matter how many goals they are able to win with, perhaps this is their first game of the season so it is better they start with a win in order to boost their morale against the the many matches that awaits them this season.