One of the major complaints people had with Dragon Age Inquisition is that it didn't have full cutscenes for all dialogue and instead did the zoom closer thing for all the minor conversations. People hated it!
There is an argument for a no-cutscene game . . . but that ship has sailed. For a wider mainstream audience Baldur's Gate 3 is going to have cutscenes . . . and having them for all conversations is what people expect. The simple one line scenes don't take any special programming on Larian's part and are likely fully auto generated.
