To address your first point, there're a constellation of relevant answers.
1. Most people who dislike or distrust the police don't actually trust those numbers. There are decades worth of documented evidence of police lying about people carrying weapons, and sometimes even carrying weapons to plant on people they kill. So from the start, a lot of us think that number is an undercount, possibly by a dramatic degree.
2. Even among the people who are armed who are shot by police, there are people who weren't doing anything wrong who were still shot. The most recent high profile version of this was Philando Castile. Technically, he was armed when he was shot, but when he was killed, he had already informed the police about his licensed, legal firearm and was moving slowly towards the glove compartment, as instructed by an officer, to retrieve his registration. So it's not just shootings of unarmed people.
3. Police don't just shoot people to death. George Floyd was not shot; Derek Chauvin kneeled on his neck for just under nine minutes. Eric Garner was not shot; Daniel Panteleo choked him to death with an illegal chokehold. Adam Trammell was not shot; he was hit with a Taser, 18 times, while in the shower and experiencing mental issues, and it caused his heart to stop. Sandra Bland was not shot; she supposedly hung herself with a plastic grocery bag in her cell after being arrested as a result of a pretextual traffic stop. This list could go much, much longer. Only looking at shooting deaths artificially constrains the number of people police kill in a very deceptive way.
4. There are so very many other ways that police can make your life absolutely miserable without shooting or killing you. I am not Black, and so I have been spared many of these experiences, but of my Black friends and family, I can tell you this: every single one of them has had police harass them for absurdly minor issues, or sometimes no issue at all. A number of them have had a police officer point a gun at them. Almost all of them have been at some point unofficially detained for some length of time. Some of them have been arrested and then eventually released without charges. All of them who drive get pulled over at least a few times per year, without fail. These are mostly middle- or upper-middle-class professionals. They live all over the United States, in cities and towns, in places with large Black populations and small Black populations, and yet their experiences all share a commonality that is terrifying when you pull back even a little bit and look at them as a pattern.
5. But maybe this should have been #1...what do you think is a reasonable number of shootings of unarmed people? Personally, I think that number is zero, so even "just 14" is absolutely grounds for extreme anger, even if you want to ignore my first four points. I don't think the police, people who are given special dispensation and training to use violence in the name of the state, should ever shoot and kill an unarmed person. I actually think any number of deaths caused by police is too many deaths. In every situation, they are the people with the most training. They are (ultimately) the best-armed. I recognize that, in a country with as many guns as the US, maybe the police will have to kill some small number of people per year, but I think every time they do, that shooting should be heavily scrutinized. We give them these weapons and powers so they can protect people, even people who commit crimes, and if they have to kill someone, they have failed to protect that person.
I hope those points answer your first question, and start to explain the answer to your second question. In response to that, though, I would first ask what you've read about police abolition so far.