For me yes. If they don't score it's a PT and a YC why should they avoid the YC as they are slightly worse at cheating?
I understand Toby, and there do need to be risks attached to such action for sure.
I guess my old head says.... obvious offside interference when try likely = PT. & the fact that it is now kickable increases the jeopardy.
If you apply the same principle as this decision in other area's then: Every push over scrum PT awarded ,should have a YC to the player identified as dropping the scrum ,yet we rarely see YC in those situations.
I guess its the 'double whammy' aspect that seems so severe in these circumstances.
Scenario: a defender recognises the oppo could get quick ball from a ruck and would likely score and he deliberately dives into the ruck to kill the ball, ....we'd all expect a YC. These decisions don't generally result in PT as well, yet there is an argument that this defenders actions are
more cynical than Aaron Smiths 'unsuccessful' try prevention.
Its not something I'm bent out of shape over, really not, im just juggling with the comparable penalties in each of these cases.