When I was permanently injured and couldn't run anymore I took up racewalking (after a couple years, when I'd gotten to the point where I could again do regular walking with little or no limp).
I'll be honest and admit that in the ~100,000 miles I've walked since then, only once--and just for a few seconds, before the road changed gradient--did I have the "flowing" sensation that I'd routinely had as a runner, and that made running so addictive for me.
That said: I was a lousy racewalker (and had stunk as a runner, before that). Among other things, I had/have trouble straightening my legs, which means trouble staying legal; I was never DQed, probably because the judges realized I was no threat to win anything and thought, If he wants to do 50km of this, let him. In my case, the faster I went, the smoother and more legal I became, and this gave me a clue that the folks with truly good technique might well develop that "flow" and get real pleasure from their walking.
I was fortunate to compete with some high-level walkers, including a couple of teammates who were ranked top-ten in the US, so can verify that some of them did indeed have the muscular bodies that were mentioned above--considerably more mesomorphic than the typical distance runner. And, also as mentioned above, a lot of them were just "athletic" and had backgrounds in multiple sports and other t&f events. Quite a few had been hurdlers for some reason--maybe because that flexibility and kinesthetic sense were assets in walking.
All of *that* said: As a racewalker I did qualify for some big (to me) meets and got some free clothing and meals/lodging, which I never would have as a runner. And it gave me a chance to compete again and feel vaguely like an athlete. I still walk the occasional marathon and find that I'm competitive with some of the runners in my age group. I probably wouldn't go across the street to watch a walking race, but the same is true for any other sport including t&f--I'm just not a sports fan.