It's pretty unreasonable to ask the DM to bend over backwards so you can do something that's patently not legal.
If it was patently not legal, it would actually say "You cannot intentionally miss".
The other thing is: you need to be Flanking in order to use that Rogue Talent - WHY would you purposefully miss and not just hit the enemy
Because like you, the designers didn't seem to foresee situations where you would want to give up your attack so another can get one.
Let me give you an example: If you, as a rogue, and your party member are fighting a creature that has high DR and you don't have a weapon that can bypass the DR, but your party member does. It would be better to "give" your attack to your friend in that case.