If the World Champion wanted to race 70.3 worlds you don’t think they’d let him? That’s a bit naive. DQ counts as a qualifier but no chance of letting the champion in? But that’s besides the point. He’ll only go if IM begs and pays him enough to.
Hayden Wilde biked a 1:56 and ran a 1:08 in Melbourne last year after a shortened swim. And he’s just one of the multiple people with a serious shot at the podium.
Different course, but in Mt Tremblant the swim was also shortened with Sanders and Riele riding in a fast group with Marquardt he biked nearly 2:03 and ran nearly 1:16.
It’s very likely the front of 70.3 worlds is going to be 15+ minutes in front of those guys you’ve mentioned.