It’s pretty simple you don’t commit penalties on breakaways where the player has limited time and space. Ever.
He didn't have limited time and space, he was clear of the defenders. Bouchard was too slow to catch up so Samorukov got there faster trying to disrupt Sutter.
What you're suggesting is that Samorukov should have just given up on the play and let him have the breakaway which most Dmen would never do unless they want to be benched for lack of effort.
What you still haven't admitted is that this was all due to Currie's pass handcuffing Bouchard. That's what created the whole sequence.