There is more to it than that. With searing and high temp finishing, which seems to be the accepted only way to properly cook a steak in OT because the experts in here have read online that supposedly that's the best method, you get graduations of temperature from the sear to the center. That changes the way the proteins react all throughout the steak. With sous vide the protein reaction is consistent basically all the way through. With a low temp cook like sous vide the proteins don't contract as tightly either which tends to retain more moisture in the cells of the meat so you get a juicier steak in the process.
Also, there is no 2 hour "investment." Unlike pan searing or grilling you aren't as slave to perfect timing. You drop your vac bags in the water and come back two hours later. It takes a few seconds to drop them in the water and takes a few seconds to fish them out. In overall time you're spending just as much time, if not more, with the pan searing/oven finish method.
btw, have you ever done a sous vide steak? What other methods have you used to cook steaks? iow, what makes you consider yourself experienced? Employing a single method doesn't imply experience, imo.
I see.
Unlike the typical internet mindset, I will withhold further judgement since I haven't personally tried a sous vide steak.
However, based on OP's pic and 2 hour investment, it doesn't look appetizing at all. Reading about it doesn't seem tantalizing on paper either.
But then again, a properly cooked high-heat cast iron steak also requires bringing the meat to room temperature which takes about 60-90 mins as well (makes ALL the difference vs cooking it straight out of fridge).
Your repeated second point about the short 'timing' and proper cooking window of grilling/cast-ironing makes it like sous vide method is for noobs who can't learn to grill/cast-iron the steak properly. So they have to invest 2 hours in sous vide. With zero ego and snobbery, grilling/cast-ironing steak perfectly isn't hard... at all. It just takes some practice.
I will reserve my judgement on sous vide. You may it sound like it's somehow magically more delicious. I doubt it because prime rib is essentially similar (slow roasted). The meat is pretty much very evenly cooked as you can see:
Prime rib is fvcking delicious. If sous vide is similar then, great. But then why does this method exist for steaks? Just prime rib it (standing roast).