One of the most difficult things for tall and strong wrestlers to do is find ways to make the crowd believe that they're in peril. There's a good reason why much of WWE's 1980s strategy involved Hulk Hogan fighting 500-pound evildoers. As a 300-pound babyface, Hogan selling for anything less than a 500-pound bad guy would likely have been quite difficult to believe. It's hard for a tall and big ass-kicker to be seen as anything less than being able to wreck shop at the drop of a hat when say, being pushed around by someone smaller than him. To do this with any level of excellence is a unique skill that very few wrestlers have ever been able to master. So, while yes, it may be completely unfair to expect someone to be really great at a skill than roughly 10% of all wrestlers ever have actually excelled. However, it's totally a skill that unless a few gifted WWE big men can excel at mastering, that will ultimately hold back all big men from succeeding at a higher level in the future of WWE.