Writing statistics in a checkpoint has a cost which is visible usually only for very large tables. However it is worth mentioning that, this statistics would be very useful for data skipping which speeds up subsequent operations.
In Databricks Runtime 7.2 and below, column-level statistics are stored in Delta Lake checkpoints as a JSON column. In Databricks Runtime 7.3 LTS and above, column-level statistics are stored as a struct (struct format makes Delta Lake reads much faster)
There are two flags that control column-level statistics in checkpoints
delta.checkpoint.writeStatsAsJson & delta.checkpoint.writeStatsAsStruct If both table properties are false, no statistics are collected or written - and readers won't be able to perform data skipping.
For more details on tradeoffs with statistics and checkpoints, see here