There is an injury often called runner's knee, it kind of encapsulates a few different things actually. Runners knee is generally a short term injusry, addressed through PT. There is no such thing as "runner's knees." The idea that running is long term any worse for most of our knees than any other activity is an urban myth. Our bodies were made to be used.
Don't take my word for it though, here is a quote and a link. Took me 10 seconds of googling:
Knee and joint pain may be common complaints among runners, but chances are slim that arthritis is the culprit. In fact,
multiple studies have shown that regular running strengthens the joints and actually protects against development of osteoarthritis later in life.
“It’s very common for people to say, ‘How do you run? Doesn’t that ruin your knees?’” says
Steven Mayer, MD, a physician in
physical medicine and rehabilitation at
Northwestern Medicine Orthopaedics. “There have been several
recent studies that have debunked that myth. In fact, they have shown the opposite — that running tends to be protective of knee arthritis.”
https://www.nm.org/healthbeat/healthy-tips/fitness/is-running-bad-for-your-knees
I'm not suggesting that people with injuries or in the last years of their lives suddenly take up running. And yes, there are many ways to get good exercise. But to say that being a life long runner will lead to problems later in life is foolish. All forms of exercise have risk of injury. No exercise at all may come with the highest risk of all.
I'm 56 years old and run 25 to 40 miles a week. I haven't had a running related injury other than sore/tight muscles in at least 15 years. My son's high school cross country coach was a lifelong runner who influenced hundreds of young men and women. He was still really fit when he died, while running, at 71 years old. He was hit by a drunk driver going 40 mph over the speed limit who fled the scene of the accident. That sort of thing is the most dangerous part of running. He always said "go the extra mile, it's never crowded." I try to live by that philosophy.