Horizontal short dramas are actually quite good.

The love that cannot be seen in TV dramas can be found in horizontal short dramas. The soft snow, the sword reflecting the peach blossoms, and holding the pen are all quite good. The faces are also fresh and pure.
It may be related to the standards of censorship. But at its core, I think it's mainly because short dramas are still in the stage where they haven't been completely destroyed by POS yet. TV dramas are already all POS.
Another objective factor is that duration is very important. When a TV drama easily has dozens of episodes, it's a way to exploit and harm people.