Enabling OTA updates for all devices by default is not always a good idea as some updates are known to break devices. Personally I advice only updating Zigbee device OTA firmware after finding a problem, (and unfortunatly the ZHA integration does not allow you to OTA update only specific devices). See ex:
https://github.com/zigpy/zigpy/discussions/660
You can use ZHA Toolkit to manually update OTA firmware on individual devices only if have problem: