I understand what you are saying, Eddie, but bail can impose restrictions on the suspect, such as requiring to report to the police station at regular intervals, surrendering the passport, or be required to desist from certain actions - such as no contact with specified persons or keeping away from certain addresses or areas.
If a person is suspected of carrying out a murder there would be nothing to stop him (or her) leaving the country whilst investigations continue, as an example.
This is extremely worrying.