Or looked at it the other way: If two people have feelings for each other but suppress resulting actions due to company policy, how would that not influence decision making?
There's a difference between the feeling, "hey that manager I pass in the halls occasionally is attractive", and "I am in love with that manager".
The first is unavoidable, and although we try to correct for it in internal hiring/promotion processes by referencing assessments from multiple persons and making a data-driven decision, the second is completely avoidable by not dating the person!
After having graduated high school, most adults don't just fall into relationships. It is reasonable to assume intent is present once the connection between two individuals can be considered a "relationship" in this context.
Or looked at it the other way: If two people have feelings for each other but suppress resulting actions due to company policy, how would that not influence decision making?