Despite this article, I'm still not convinced that the algorithms aren't better. The policy states that people need to use their best judgement and can override the algorithms. The article argues that the algorithms are being over relied on. The article mentions in passing, however, that the statistics were worse before the algorithm was introduced.
The point of the matter is, best judgement can be shitty. Your average cop has no idea what questions to ask without a list and how important they are per research. Some suggestions are too continue using the tool but use things like psychologists to administer it. The only way you could reasonably have a psych on call for every police station is to make it a remote interview, which frankly doesn't seem better to me.
In the end, the unstated problem is resources and how best to utilize them to prevent the violence. I'm sure Spain's policy could be improved but shoring it up with an algorithm is a good practice.