I really dont get complaints like these... what exactly are some people looking for? A dating app inside a videogame? What kind of conversations to you want to have with an average NPC random avatar out of the gazillion ones in the game. Do you want to know its favorite food, or his favorite sport? Why?
You mention GTA4, what part of GTA4 allows you to go out and do something like that with a RANDOM NPC? Only thing you can do is pay hookers for car sex...
GTA4 is such a horrible example whenever there is a mention on sandbox games, I swear I dont get how people dont see this... All GTA games are EXTREMELY linear when it comes to how every single mission plays out. You have absolutely zero agency... you have to hit specific markers with ridiculous constrains. If the game tells you to hide behind a box, you have to hide behind a very specific box so the game can continue. All you do in this game is follow instructions to the letter and your gameplay consists literally of auto aiming and pop shooting everything that moves and driving vehicles. Thats it. You want to be stealthy? Tough luck. You want to try a different approach from the hills? Nope. Follow the yellow dot please.
Cyberpunk in comparison offers a ton of options, a ton of different outcomes, you feel in control of what happens next you get to choose how things play out both in terms of story and gameplay. You have huge questlines with major NPCs and you get a ton of dialogue with them and you can shape your relationship far far more than you can in GTA, where you basically just watch a cutscene.
How GTA4 is a good example of anything in regards to NPCs is beyond me. If you said RDR2 then yes I could see a point. But other than that I dont care what a random NPC had for dinner in a videogame...
I'd say comparing CP77 to a Far Cry game is more fitting than a GTA game. Far Cry allows the player to complete missions in various ways (combat wise). CP77 is a bit linear too since pretty much right up to Nocturne OP55N1. Sure you can choose not to do side stories/content, but that's true for a lot of open world games.
Comparing CP77 to a GTA game in broad terms is just pointless as they are both quite different games. But I'd say its ok to compare specific comparable systems that both games share, such as driving, and the "wanted" system ect.