ESPHome sensor_uptime_timestamp vs uptime

[TheGroundZero]

In config/esphome/sensors/uptime.yaml you mention that this sensor should not be used in combination with Home Assistant.
Yet in config/esphome/sensors/uptime_timestamp.yaml you state that sensor/uptime.yaml is required.

This package needs time/homeassistant.yaml and sensor/uptime.yaml to work.
See common/time.yaml for an example usage.

common/time.yaml includes both files

sensor:
  - <<: !include ../sensors/uptime.yaml
  - <<: !include ../sensors/uptime_timestamp.yaml

Doesn't this contradict?
What am I missing?