Why does the carpenter say that the back of the sideboard is not against the wall

carpenters say that the back of the sideboard is not against the wall for the following reasons:

1. Ventilation: leaving some space on the back of the sideboard can provide better ventilation and prevent moisture accumulation and mildew.

2. Maintenance and cleaning: If the back of the sideboard is against the wall, maintenance and cleaning will be more difficult. Leaving some space is convenient for maintenance personnel to enter and carry out necessary maintenance work.

3. prevent the wall from being damaged: if the back of the sideboard is directly attached to the wall, the wall may be scratched or damaged. Leaving some space can avoid this.