Precisely.
If you OC and nobody seems to object / notice, it simply means that they don't want to draw your attention, as you are obviously a "different" person (since you are doing what is not typically done in public) and you are armed. Not because they don't care or don't notice. This definitely won't make them feel better about guns.
How do you know the majority of people who don't seem to notice or care actually just don't care or thinks it great to see someone exercising their right to carry a firearm?
I assume it is also very dependent on the locality. People in a rural area would probably be more conservative and accustomed to guns than someone in a metropolitan center.
Having a right is great, but it doesn't mean that you are always making a right choice when you decide to exercise it. According to Michigan Supreme Court, I have a right to swear in public, even in front of other people's children. Should I do it ? Not really.
And historically most of the anti-open carry comments come from people who either have never seen it in normal, everyday life or choose to believe the concealed carry only element of surprise theories. Most of the members on this forum who support permits and background checks and government regulation of firearms come from already restrictive states and have not experienced living in a free state where the lack of gun restrictions cause no problems at all.
How many people quietly freaked out ?
How many decided to just stay out of this (i.e. they won't call the police since they are not sure you're a threat, and don't want to get in the middle of this). This is probably the majority.
And how many people quietly support the guy open carrying? How many of them know deep down inside that they are helpless should a criminal decide to pick them as a target and are relying upon the "won't happen to me" theory? How many of them are just too afraid to take steps to protect themselves and quietly admire the person who is? How do you know that the anti-gun crowd is the majority?
How many had called the police and were informed of the law ?
Then they received a little bit of education, didn't they?
Finally, it may depend on your locality. When a guy tried to open carry a rifle through downtown Birmingham (a posh Detroit suburb) he was very quickly apprehended. He was definitely in the right and may end up winning the case. He was also definitely trying to draw attention to himself, and he is not making any new pro-2A converts. Quite the opposite.
Most of the big cases that have went to the supreme court, such as Terry v. Ohio, which have resulted in big decisions that protect our rights have been brought by criminals trying to get out of a conviction. Was the civil rights movement success won by blacks who quietly stayed in the "separate but equal" bathrooms, drinking fountains, back of the bus, churches and schools? Or was it a success won by those that were "definitely trying to draw attention" to themselves? If we don't actively fight for our Second Amendment rights they will slowly be legislated away with "reasonable regulations".
I would rather the exercise of the 2nd Amendment be demonstrated by 100 people quietly open carrying their handguns in everyday life, regardless of how many people it causes to be uncomfortable, than by 10,000 people carrying their guns hidden or by 1 guy who does, literally, shove his gun in peoples' faces. Progress is seldom made when everyone is comfortable and feels warm and fuzzy inside. Progress is normally made when a need arises and someone else is willing to do the work to provide the solution.
The American public is going to be forced to acknowledge that the government cannot provide for and protect them. But we can quietly demonstrate to the public that it is possible for us to protect ourselves.