you are right, if Barca are right to risk their fate on inter this will make it difficult for inter to only need one win to destroy Barca's dreams and hopes to get through this group stage, Barca will be an outcast group in the Champions league, don't be too happy with a little hope.
Barcelona's chances of qualifying for the last 16 of the Champions League are already slim because Barcelona need two wins in the two remaining matches in the Champions League group. And the problem is that one of Barcelona's opponents in the two remaining matches is Bayern Munich, which is still famous for being very strong in the Champions League, this is what makes Barcelona's chances look so slim to qualify for the last 16 of the Champions League this season.
Meanwhile, Inter Milan only needs one more win to get a safe position and qualify for the last 16 of the Champions League, because if the points are the same, Barcelona also cannot be in second place in the Champions League group standings.