Each Don did require acts of extraordinary bravery/stupidity from their henchmen but the henchmen knew the price of the ticket when they got on the ride, so to speak.
I wouldn't say it was exactly the same though. Vito would not have minded if Luca had been able to murder both Sollozzo and Bruno Tattaglia. Vito also would have been very happy if on the other hand Luca had been able to discover that Barzini was really behind the deal and report back, unharmed.
With Frank, Michael had explicitly told him that he was not to harm the Rosatos. In both situations you can argue that the boss was underestimating the opposition and the subordinate paid the price.
"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming
Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.
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