I don't know about “always” but there are certainly quite a few dishes that restaurants cannot master easily. When they do master them it is at great cost.

One favorite example is the Italian rice dish called risotto. I've had risotto all over the world, including all across Italy many times in my life. I would say that about 80% of the time it sucked. But when I make it at home it's flawless every time. And it is a joy to make.

Another dish, also Italian, the restaurants just can't seem to master, or even be bothered to make correctly, is the classic carbonara. Listen, I get it. If your timing is off by just a minute or two you end up serving pasta with scrambled eggs instead of pasta with a lush rich silky sauce made from egg yolks. I can execute this dish at home flawlessly every time, but I don't work in a commercial kitchen. So what the restaurants do instead is load it up with tons of cream and extra cheese, and they call it carbonara. But it's not carbonara.