I would tend to agree with your first statement. Why a tactical team for such a small marijuana case? But we don't have all the facts surrounding their decision to use a team at 0430 hours instead of say a group of detectives or some plain clothes team during the day. We just don't know. Maybe thats just the standard procedure there. Maybe thats all the resources they have. But I can say, just from the facts I have from the articles from the OP, I wouldn't use a tact team for that.
You keep trying to justify something that isn't justifiable. We do actually have the facts. The problem is that the facts don't seem to support such action by the police. Keep trying.