Of course TES lore beats the Witcher's lore. But Fallout 4 forces you into that crap story of looking for your son as well, your forced to tell people your looking for him during dialogue with Piper for example, you can't leave that dialogue until you go the direction the game wants, again with other dialogue options, be sarcastic... if you could even call it sarcasm, your conversation is cut and if you re-enter the conversation you suddenly know all about skinny Malone (Looking for Nick Valetine quest) the same with the MM, they invite themselves into sanctuary then ask if your willing to do some work... of course you can refuse but you can't do anything else apart from saying yes or no, how about exiling them and discovering your choice has lead to them to being butchered by the quarry.It's just lazy.
Only gripe I have with the Witcher 3 is the required level for weapons and armor, being level 4 but requiring level 37 is a melt, by the time you reach that level, your 3 years older and forget what your leveling for... and the fact you can't sneak or crouch is crap. I'm playing the Witcher more now over Fallout and I don't feel as if I'm being reigned into the story as they want me to do it, the amount of side quests that are so well written, the Witcher contracts along with treasure contracts, side quests along with the politics and racism involved, gives you ample choices and paths to lead Geralt... and although your a fixed character, it adds so much, you forget that issue or I at least do but Geralt is a great character. A few weeks ago, I remember two lads talking about the Witcher, both had completely contrasting endings and they ended up debating how they made choices... all I've heard about FO4 endings is criticism.
Oblivion is my favorite Bethesda game, if they remastered that, I'd buy it in a heart beat, I'd even look forward to it more over upcoming titles because if the "deliberate" poor writing is the accepted path for future games, with the accepted attitude surrounding bugs..." Oh its Bethesda, you have to expect that". No you shouldn't, not anymore.
You said it yourself and I agree, they can write good quests and material, so why aren't they... should the franchise not deserve the best, its not like they can't afford it and make back the money. Oblivion was good at the time of its release or I at least was content with it,.. running with that theme of being released from some sort of captivity and having the world at your feet would be a good foundation for future titles.
Only thing I fault with FO4 is the story (Quests,dialogue and voice over,bugs) the honeymoon period with the mods are over for me now unfortunately and I just can't get into it anymore. I think the hype for F04 was it's ultimate curse, it didn't live up to it, so it's not really the games fault. Lets hope the next one beats all expectations, writing is on par, everything is improved but I wouldn't hold my breath as the game is a little too PG nowadays, even with all the killing and chem's... in my opinion lol