I don't think so. Not everybody holds on to cars until it's no longer financially viable to do so, i.e. the cost of repairs exceeds the value. Not everybody runs cars into the ground. The last car I got rid of was a 2013 Altima with 98k miles on it. Absolutely nothing wrong with it, but found it boring to drive. So it was traded in for the GTI. Prior to that, it was a 2007 Mazda 3, with something like 75k miles on it. Traded in towards the Altima because I needed something bigger. There doesn't have to be a mechanical "reason" for getting rid of the car.
This probably was an unmodified, properly maintained car. I'd understand the hesitation to buy it since you can't really know for sure, but take a step back and look at it objectively. The owner drove 10k miles every 6 - 8 weeks. And like clockwork, he was getting services done. There were 6 oil changes done in just over a year. Owner was probably on top of taking care of it since he knew he drives a shit ton of miles, and wanted the car to keep up.
He just rolled over 200k miles. 200,602. Now, there's no denying that's a ton of miles, which obviously wears down parts. At that mileage, you're approaching where things could start to fail, not necessarily that they did already start to fail. Owner probably got to 200k, said "I depend on my car for my job. I can't deal with the headache if something breaks. 200k was a good run, but I'm going to trade it in before that happens."
From the story the car is telling, I doubt there is something wrong with it, or that there was a car related "reason" he got rid of it. Most likely, the owner got rid of it before something happened, so he didn't have to deal with it. Because again, 200k is a shit ton of miles. But it could last another 100k without issue. Or the engine could just give up the ghost and die in 5k more miles. You never know. It's a gamble you take buying a high mileage $9k car. But to me, looking at the broader picture, I doubt there's anything inherently wrong with the car.