It's not about loneliness, it's a movie about questioning motives.
The motives of the characters are awakened from their "hibernation state" under the relentless torture of long dialogues, revealing their boring nihilistic nature, whether noble or humble. The kid who was questioned but didn't reveal his motive showed aphasia, while the alcoholic dad who was questioning but not being questioned didn't even do anything, let alone a motive.
The upper layer is questioned, but the bottom layer is not, which not only indicates the different meanings of the meaning of life to different classes: the upper layer will pursue the meaning and motivation behind life, while the lower layer can only survive. At the same time, it also shows the subversion of values: the upper layer pretends to be cowardly and uses ethics as an excuse; the lower layer pretends to be tough and uses self-esteem as an excuse.
Finally, the snow is covered, the free wild horses are gone, and the living rabbits are caught, escaping freedom and willing to be bound, and life once again enters a "hibernation state".
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