Nexus questions, and why not go back further in time?
The nexus is described as "an extradimensional realm in which one's thoughts and desires shape reality. Inside the Nexus, time has no meaning, allowing one to visit any time and any place that one can imagine."
So why didn't Picard just desire that Soran didn't exist? Why didn't he desire to be back at the observatory so that he could stop Soran there, instead of wishing to be back just before entering the nexus?
And really, it would not have mattered if Soran had succeeded again since Picard would have been able to wish to be back before entering the nexus again anyways, so there was no real danger. A possible infinite loop. Why not have Kirk wish to be back in his time, before he "died" and be able to stop those people from dying or experiencing the Nexus?
Also, does the nexus create alternate universes, since who's desires take priority if people have contradicting wishes? Picard wished to be back in the real world in the Past, Soran most likely chose to stay in the Nexus, so is Picard just in an alternate reality, one in which he prevents Soran from entering the Nexus? Because if not, why does Picard's wish take precedence over what Soran wishes? And if Kirk had wished to go back into his timeline, he would have created yet another alternate universe, one in which he does not die.
I am left not finding any real logic to any of all this.