That's demonstrably false, it's not even the the dialogue options being limited to 4 at any given time that's the problem.It's the fact that on average you're given one or two words for each option, to essentially guess your way through the conversation, along with fatuity of not being able to return back to previous options or phases of dialogue.
You're given one shot to guess your way through a conversation, with most of the complexity expunged, only for the dialogue to be 'locked' after you talk to many characters.
There's a profusion of examples where you're given four equally intriguing examples, only for you to never be allowed to explore more than one dialogue branch with that NPC.
As I've said before the dialogue system is arguably the worst aspect of Fallout 4, and I've seen many more people disparage (via two polls on these forums) it than praise it.