Here's the translated bit from the French magazine - I'm just taking this from the OP. I just want put aside questions about the fidelity of the translation, or the reporting, for the moment.
Similarly, the dialogues have been simplified, with only a few speeches to the people. Only those who offer you missions can be questioned by a few questions on the screen.
Focus on that second sentence, which is the controversial bit. One thing the sentence tells us is that there are some NPCs - the quest related ones - who, when we initiate dialogue, can be asked multiple questions. Now, the point I want to make concerns what this information is being contrasted with. Some people are taking the contrast to be: there are some NPCs - the quest related ones, who, when we initiate dialogue, can be asked multiple questions,
in contrast to the other NPCs - the non-quest related ones, who ocan not be made to initiate dialogue with.
Here's an alternative contrast: there are some NPCs - the quest related ones, who, when we initiate dialogue, can be asked multiple questions,
in contrast to the other NPCs - the non-quest related ones, who, when we initiate dialogue, can be asked only one (or at least very few) questions.
If you can't detect this reading of the quoted sentence, trying saying it aloud this way, where the capital letters indicate rising intonation or stress:
"Only those who offer you missions can BE QUESTIONED by a few questions on the screen" versus "Only those who offer you missions can be questioned by A FEW QUESTIONS on the screen"
Or, the TL;DR version: the sentence from the magazine doesn't necessarily tell us that we won't be able to initiate dialogue with non-quest related NPCs; it could just be telling us that we'll have only one or two dialogue options when we initiate dialogue with a non-quest related NPC.
Ok, so people have already said that, but hopefully this at least makes it more clear why that's a plausible hypothesis, given what the magazine says.
EDIT: Just on the point that it would be a fairly bad situation if non-quest related NPCs were
immediately differentiated from quest related NPCs simply by not being able to initiate dialogue options with them. I initially agreed with this, but then I thought it might be ok. In Oblivion it wasn't so bad that some NPCs didn't have many dialogue options, because even if they weren't quest related NPCs at that point, they might become quest related at some later point, and then the appropriate dialogue option will appear in the interface. But it seems pretty straightforward to get something like this even if non-quest related NPCs can not be made to initiate dialogue with. At one point, if you haven't got the right quest, then a certain NPC can not be made to initiate dialogue with. But at a later point, when you get the right quest, then you can initiate dialogue with that NPC.
So you're still, as it were, in the dark about whether an NPC has any quests related to them. The difference between this and Oblivion is just that, at that point in the game when you don't have any quests related to that NPC, you can't bring up the dialogue interface with that NPC. This doesn't strike me as a huge different, TBH - but perhaps someone has a different take on how this matters?