Olympic lifting in anything under the super heavy weight has a lot to do with technique. And they all have a lot to do with power and explosiveness.
Some goes with who are in the sport too. I see here coaches taking someone who is 'strong' with a massive squat or bench press and being like you have a shot at Olympic lifting. While Hossein Rezazadeh (Men's world record in super heavy weight lifting) was a 2.00m high jumper as a junior before taking up lifting and his coach saw that and thought he may be explosive enough to be a world class power lifter. So he took a massive, explosive frame and stacked muscle onto it over a few years and you got the world record houlder.
And since not many people try it the test group is smaller. Not the best ATHLETES in the test group. And yes these guys are major athletes. It is a lot like how some high school athletes throw records in hammer and then get to college and the top American athlete is someone a good coach found who is somewhat good at discus but was on their teams 4x100 or a jumper.
The strongest athletes in the United States are usually only training so that they can do that for football. Or power lifting because that is just about moving a big weight and not the technique.
****But anyone that thinks Holley Mangold lifts that much just because she is fat is a complete idiot. She is obviously over weight, but she is an athlete and very explosive. She was able to catch on so fast because she did not do conventional women sports, she played lineman on her football team! She lifted weights, and ran full speed carrying all that weight to tackle and block. Far more than the 'average' fat chick does.
And the top men's