I don't think the goal would necessarily be to win AGT and get the show in Vegas. I think it would be to put themselves out there and advertise the sport. Shouldn't we all be happy about that? You all take every opportunity to try and validate allstar as a sport, yet when a recognizable team gets a chance to show everyone outside the cheer world how much talent allstar takes, we all want to keep it to ourselves and say that nobody would ever want to watch it. Did everyone just begin loving gymnastics and figure skating and football as soon as they saw it the very first time? Some yes, but for many more, no. You learn about the sport from watching it, and think of ways to improve it and grow it. Sometimes the best way to develop the sport even further is to ask people who don't like/understand it about what's wrong with it or what could change to make it more eye-catching and legitimate. One of the best ways to do that may be to put it on prime time television and listen to the feedback.
Stars did Glee, F5 did AGT, but for SE to do it it'd be "a bad idea". Maybe a small break is exactly what they need! Let the coaches/athletes ruin their chances at worlds if you think that's what's going to happen. Besides, like I said, they got invited, nobody said they're even 100% pursuing it yet. Isn't that like the week or two before Cheersport? Who knows what they'll do yet.