indeed we do see that love is a factor (Yitzchak loved Rivka, for example, in Parshas Chaya Sarah)
Calling the parsha “Chaya Sara” is perhaps indicative of the writer’s level of familiarity with it. The verse to which they refer reads “And Yitzchak brought Rivkah into the tent of his mother Sarah and he took Rivkah and she became a wife to him and he loved her and Yitzchak was comforted regarding his mother.”