One could easily cite that as a reason they won't survive, but they've tanked stronger energy blasts from Cell and Buu, etc. I think the canonical reason Vegeta died was that he couldn't breathe in a vacuum, and they said Frieza would've survived it himself, despite being in a much weaker state. Keep in mind that the writer of Dragon Ball almost never bothers to reference his own rules with regards to who can survive what. One clip from Dragon Ball Z shows Goku stopping an energy blast with his chest, and then in the last movie he gets somehow caught out by a weak ray gun blast. IIRC the Super Saiyan God form was said to survive in space before they decided to go back on that one too.