I feel like I'm stating the obvious
but :
If you want to go against the Codex hivemind, join me in my Holy Crusade against Baldurp Gay series and Inbred Engine games! We will make a lot of enemies and earn a few tags, but the truth will prevail!
Nah, Baldur's Gate is one of the more consensual in general, people generally think it's decent D&D campaign and it's decent party of pregens adventuring with story choices (and romances if we're talking about Baldur's Gate 2). This exact mix is what players who're vaguely into RPGs mostly like the most and otherwise they will at least vaguely like the game for only one of the two reasons.
Codex hivemind is different though'. Compared with other places, it's composed much more of players who really loves Fallout + some old-schoolers. Then, between real-time with pause, cringy, romanceable companions, finally few dialogs and related story choices if you compare Baldur's Gate 1 compared with Fallout or Arcanum and also overall limited interactions with the world compared to the same Fallout or Arcanum there's a non-neglictible part of the place who hates these games or think there are mediocre.
Fallout is more consensual compared with Baldur's Gate inside the Codex.
Codex is Fallout lovers's place. But there are at least two other ways to explain that.
I don't know if there's a game that more than Fallout is between old-school and modern : it's single character + companions but there are not cringy companions (some would say they have their own agenda), it has a heavy story but you uncover it through' active exploration and it's a story you're making yourself and it's much more of a cool than cringeworthy story, combat is turn-based but game is not a combat-heavy D&D campaign but rather a game with a big focus in proposing alternatives to combat, the game does not have complex party building but it does have game changing (not just fire arrows vs magical fire arrows) single character building, there's some handholding compared with games with no quest log for example but nothing which would make you bang your head against a wall ...
And I mean borderline feature(s?) such as lack of control of characters during fights, different players may think it's a good thing or a bad thing but all players understand both why it's there (because game focus on character interactions with the world based on its sheet) and why it makes combat less tactical (less control).
If we focus on the comparison with Baldur's Gate, the reason why Fallout is Codex's favourite is because it's the best game focused on exploration, dialogs and other fun interactions with the world which are not dialogs. The 3 parts are important. ... The two first points, or more precisely extensive use of skill check in dialogs and choices during dialogs is why modern devs (for example CD Projekt, from something which was linked here) and likely a lot of younger players or players which don't particularly care about deep RPG systems love the game, they think that this gives the game a strong P&P feel, which the game does have. Now in my opinion it's so much more than that which gives the game a strong P&P feel, the interactive environment, turn-based combat, the small text descriptions, story you make yourself and other things most players and devs at best don't give a shit about and at worst hate, but the fact is we both like the games.