Assuming the oven can hold a temperature accurately, your roast would boil at 212. But air is a poor conductor of heat. So even at a temp of 350, most braises don't achieve a rolling boil. And ovens are terribly poor at hitting and holding a temperature as well, commonly swinging 25-50 degrees above and below the set temperature. While the air is hotter than the boil, it just can't transfer enough heat into the braise fast enough within certain limits. I've not seen recipe for a braise at 375, they've topped out at 350 in my limited home experience.
And the premise of never boiling meat has some caveats. I find a pressure cooker my preferred method for preparing corned beef. At 15 pounds of pressure, the water boils at something around 250 degrees. That's where I'm cooking that corned beef and it comes out tender with great flavor.
And there are times I "roast" at low temps, 225 -250. Pork ribs for example, or a ribeye roast/prime rib.
The premise of the braise is to use liquid as the heat conductor. it's much more efficient than air. yet moderate the heat so it doesn't exceed "the boiling point". Same as a bain marie. This allows the meat to come to temperature more evenly than would be possible in a dry heat method, but without running into temperatures that would cause uneven cooking and drying in the outer layers.
It's still cooked to the point that would be dry in most other cuts of meat. The water moisture is largely wrung out of the meat by the contracting proteins. If you try braised meats at temps from 160 up to about 175, they're dry and tough. But a phase change happens as the meat moves from 180-190. The collagen melts out and re-wets the meat. The collagen breaking down results in the meat being tender too. YOu'll notice that meat hits that 180 point and just stalls or plateaus for a while. It's because of the phase change.
But if you keep cooking past that point the meat will continue to dry and toughen some more. So even with the pressure cooker, I'm still pulling the corned beef at hopefully the 190 point.