I agree with you and that's actually the case here. If these activists think their house arrest is unfair, they can complain to an administrative judge that will look into their case.
You have to get a verdict first in order to detain them and not let them do the job for you and make them go through hardships for a redress and emergency laws are not just or fair to entertain them .
This is temporary, the country is in "state of emergency", that gives the government and the police special powers to reestablish order. I think that was justified after the attacks but I would oppose it if the government wants to extend it past 3 months.
You have to get a verdict first in order to detain them and not let them do the job for you and make them go through hardships for a redress and emergency laws are not just or fair to entertain them .