The ORM makes it more likely to do stuff in the application instead of the DB because many queries are hard or impossible to represent in an ORM fashion.
Additionally, the ORM makes it much harder to see what is going on under the hood. For example you don't know if a value of an object is stored in the main table or lazy loaded from a related table. So you have no clue if echo "$user.name lives in $user.city" results in 0 sql queries or one or two.
Additionally, the ORM makes it much harder to see what is going on under the hood. For example you don't know if a value of an object is stored in the main table or lazy loaded from a related table. So you have no clue if echo "$user.name lives in $user.city" results in 0 sql queries or one or two.