So I live in northern Cal and when I was in my mid-late 50s, I started having knee issues around 2018, it comes and goes. I would just go to the gym and crosstrain on an elliptical, bike, stair climber or whatever. None of them bothered my knees, and they'd eventually recover. Never thought about RW.
When the pandemic hit, ba-zing! Another knee problem only this time, no gyms available (closed), I have no home gym, and add in horrible fire smoke. So after sitting around for a couple of weeks and going stir-crazy, I'd go out to the beaches or wherever the air was passable after work. And I'd try "race-walking" which was refreshingly ... a workout!
I tried a mile at Kezar, 8:45 then another 8:47. I'm not sure if my form was off but it was close, it didn't hurt my knee and that's all I cared about. Eventually I took to 'time-trialing' 5000s and went 28:17, 27:52, 27:16, 26:49 in several efforts over the years. Those were hard and felt like 8Ks for an open runner.
At 59 I went 25:57, and at 60 I went 25:28 for 5000, am 61 now. This was all in practice, I couldn't care less about competing, but it was something I could do in a reasonable time frame that delivered that "run buzz" you get from a good, strong effort. I've walked in front of a couple of friends who are USATF officials and they seem to think my form is pretty good.
Now apparently the world-record for 60+ male is 24:12. I may be doing OK at 25:28 which is probably similar to an 8K race time for me as a young guy, but I am very confident that if the best runners (for example B. Lagat) took up race-walking by the time they reached 60 they would destroy that record by 3+ minutes.
Agree that the event is soft. The range of 20K finish times from this US Olympic Trials was something like 1:27 - 1:51. But, it is a really good workout and I like gaving something I can do in my pocket when I'm injured, can't run, and am sick of toiling at an indoor gym.
I may talk to a coach to see if they can iron out any hitches in my form. But I just kind of do it to keep going when injuries keep me down.