Almost all parlimentary systems have a no-confidence structure.
This can happen in any of them.
If the Conservatives won a minority but one where the NDP and Liberals could vote them out immediately, the Governor General would have a decision to make.
Yes, the political culture here is that the Cons would be given first shot to make the government and it would be expected that the Libs and NDP would not immediately vote them out.
But say the Cons had a more Bernier like figure who had taken over.
If the NDP and Libs went to the GG and said "We are both telling you that if he is named prime minister we will immediately vote no confidence" what is the GG to do?
Now, yes, the dynamics are different in that Macron is President and has different power incentives than the GG.
I also don't think he is acting in good faith.
But unless the threat from Ensemble and RN is something he made up (which it doesn't appear to be or they would have contradicted him about it) then he does have to consider that the NFP
can't form a government when picking a PM.
PM is really bit of shit job in France and they get fired fairly often it seems by the president. Even so, blocking this far right coalition was supposed to be the reason Macron called the election and he had a chance to keep it down.
I don't think "blocking the Far Right" was how he justified calling the election.
He called it after the far right won and had momentum.
If he had simply not called one, the far right was already contained.
This choice doesn't seem to any more stable.
It's more stable than instantly being voted out (since the RN has said they will wait until they see his proposals).
But the moment he called the snap election people thought the situation would be less stable.
It's one of the reasons people were so mad at him for calling it.
Except that now he doesn't come off as centrist.
I don't know enough about how this is all viewed in France to say one way or the other.
Sounds like there will be another election fairly soon.
Most people predicted that after the first round results.
Some predicted it immediately after Macron called the snap election, figuring the only way there wouldn't be another would be if the RN won a clear majority.