Both what you are saying is correct and what I also said is also correct.you should be realistic, wishful thinking does not give a true picture of the county’s situation.
Lebanon is a federal country, an awkward federation of sects instead of being a federation of states like other multicultural countries. As long as the Lebanese system is based on this weird Federation of Sects systems, the rule of true majority ruling, and true minority sitting in the opposition will definitely not work. When Sanioura tried to lead a full 14 March gouvernement (when HA and allies resigned) the country collapsed. The Mikati 8 March Governement was a failure for the same reasons. Diab trying to rule without the Sunni and half of the Christians is doomed to fail within the current Lebanese system.
As long as the country doesn’t move to a complete secular system where religion will be completely forbidden in the public space, or to a federal system where the central government will not follow a sectarian order, Lebanon will need national unity gouvernements. The reason is easy to understand: Above the Law And the Constitution you have the national pact of 43, later enforced with the Taëf Agreement. According to this, the source and Legitimacy of the system is to be found in the concord and harmony between Sects.
Now I agree that the Diab Governement is gonna remain till the 2022 parliamentary elections. But the current situation, the status quo is also going to remain until 2022. I don’t see any major changes that will happen from now to the next MP elections or even the next presidential elections. When a new parliament will come in 2022, a national unity Governement will be formed that might have a minimum of legitimacy And trust to negotiate with foreign countries.
The current government will deal more or less with the day-to-day matters and businesses for the next couple of years, until a another flawed deal will be found between Sects following the next elections.
For the reason you presented, the majority camp in parliament offered a figure (Saad Hariri) from the minority camp in parliament to head the govt because he represents majority of his sectarian flock. He chose to resign first under compulsion while kidnapped in a foreign country and later on rescinded his resignation after his liberation and return to Lebanon. Then, after protests, he resigned again and chose not to form a new govt except under certain conditions. Of course, those who would nominate him and have majority of MPs in parliament refused his conditions. His conditions are exactly what contradict the spirit of consensus you explained in your post. If you give in to Saad's conditions, and you have Hezballah out of the govt and Gebran Basil out and you allow Saad to be the only person to nominate and appoint ministers for all the sectarian, then he automatically is the president of Lebanon with presidential powers. That is in contradiction of Taef. And if the majority in parliament agree to these terms and accept to be out of any govt or its decisions, then it is political suicide for them.
I dont know what you meant here:
"When a new parliament will come in 2022, a national unity Governement will be formed that might have a minimum of legitimacy And trust to negotiate with foreign countries."
Are you saying the current parliament lacks legitimacy? If so, why? Are you sure if there is election today the same majority would not return? Of course it will. I will vote for Hezballah again. One of their MPs is even from my village. I'm voting for him.