I used to use this excuse, and even still give it some credence for the larger outlook of the series, but it still doesn't justify certain decisions that are just horrible writing choices, that even a decent TV writer should be able to spot and correct. Arya didn't have to get poked up because she was waltzing around Braavos with face changing assassins after her, for instance.
I don't blame that on Geroge, I blame that on the writers wanting a big dramatic moment to end an episode, and a chase sequence set piece, so they clumsily wrote something to get them there, character and plot be damned.
I remember reading that they spent millions of dollars, and like 2 weeks to film that chase scene, when the show would have been better had they just cut it entirely....or spent an extra hour in the writing room.
I feel like I've been more than fair to D&D, as I understand writing for this show is more difficult than writing for other shows given the time restrictions. Because of the tight schedule they have to shoot in multiple countries at one time during winter with like 4 or 5 different camera crews, while allowing enough time for pre-production (scouting locations, costumes, building the set pieces, sometimes inventing new tech just for a single scene) and post, they have to produce a script in a few months, and that first draft pretty much has to be very close to the final draft because they don't have the time to make big changes. I get it. They have a few months to write something for a huge production, and don't have the luxury of the years it takes GRRM, or even the years it takes for big budget hollywood movies to film a 2-hour blockbuster. I get it.
But some of these problems are problems only because they decided at some point not to worry about their writing making sense. A few lines of dialogue or an extra scene would "fix" a lot of the problems. But they have come to the point of just not feeling the attention to detail is worth it. And that is solely a D&D stance, which I can be angry at. It's one thing to just not be able to come up with great stories because you are meant to adapt rather than write original stories. But it's another thing to ignore consistency within your own show because being logical is now not dramatic enough.