I'm actually fine with that. Let it be written! Let it be done!
You can play any way you want. I was merely answering the assertion that there were no rules for such things. I think perhaps some of the confusion stems from a subjective interpretation of what a RULE is. A particular treatment of something can be governed by rules
without being a complete procedural dice wankfest that doesn't require human input to resolve. Crazy right?
So the reaction rule is the baseline situation. It is there because the players have little to no control over first reactions. This is why a decent CHA score isn't such a bad idea if you happen to have it.
If the reaction roll permits anything other than raw hostility, the players get to engage the situation and roleplay outside of combat. I don't consider opportunities for freeform roleplay in an rpg to be "throwing up my hands" because there aren't any rules to cover it. For those that do want the rules to handle every aspect of play for them there are plenty of those rules available to use.