Uhhh Xenoblade X was NOT fully voiced (oh, did you edit your post? I swear you listed Xenoblade X as being fully voiced). Speaking of which though, if there are sidequests involving helping out people and triggering small cutscenes, I hope THOSE are voiced. I found it quite odd that in X, you do these big sidequest missions that are presented just like the story cutscenes, but aren't voiced at all. THAT came across as lazy to me.
It's got nothing to do with laziness. Are you aware of how small Monolith Soft are? Think about that for a minute and then think about the scale of Xenoblade X; think about the limited budget they're given. Now think about the limited resources they have to develop a video game. There's so much text in XCX that voicing everything would eat away at their budget. Game development is never laziness but about making compromises. Sort of disappointed that you hadn't already realised this.
Nintendo on the other hand, have enough money to voice the NPCs in Zelda BotW, surely.