I would answer no to the main question. This would be for the reasons you give, that our choices are conditioned.
Thus Gurdjieff describes most human beings as robots. For the mystic spontaneity would only be possible once the ego has been annihilated, since this would be the only way to overcome the straight-jacket of our false beliefs and conditioning. There is a lot of literature on this topic. Here is Gurdjieff presenting the communal view of the mystics.
“I asked G. what a man had to do to assimilate this teaching.
“What to do?” asked G. as though surprised. “It is impossible to do anything. A man must first of all understand certain things. He has thousands of false ideas and false conceptions, chiefly about himself, and he must get rid of some of them before beginning to acquire anything new. Otherwise the new will be built on a wrong foundation and the result will be worse than before.”
““How can one get rid of false ideas?” I asked. “We depend on the form of our perceptions. False ideas are produced by the forms of our perception.”
G shook his head.
“Again you speak of something different,” he said. “You speak of errors arising from perceptions but I am not speaking of these. Within the limits of given perceptions man can err more or err less. As I have said before, man’s chief delusion is his conviction that he can do. All people think that they can do, and the first question all people ask is what they are to do. But actually nobody does anything and nobody can do anything. This is the first thing that must be understood. Everything happens. All that befalls a man, all that is done by him, all that comes from him - all this happens. And it happens in exactly the same way as rain falls as a result of a change in the temperature in the higher regions of the atmosphere or the surrounding clouds, as snow melts under the rays of the sun, as dust rises with the wind.
Everyone finds that nothing is being done in the way it ought to be done. Actually everything is being done in the only way that it can be done. If one thing could be different everything could be different. … Try to understand what I am saying. Everything is dependent on everything else, everything is connected, nothing is separate. Therefore everything is going in the only way it can go. If people were different everything would be different. They are what they are, so everything is as it is.”
This was very difficult to swallow. “Is there nothing, absolutely nothing, that can be done?” I asked.
“And can nobody do anything?”
“That is another question. In order to do it is necessary to be. And it is necessary first to understand what to be means.”
Conversation with Gurdjieff
In Search of the Miraculous - Fragments of
an Unknown Teaching (1949)
Penguin Arkana, London (p 20)