You can still have a technocratic system that allows moral weights to be ‘baked into’ it.

For example, currently, in some states, judges are elected. The people decide what kinds of judges align with their values.

However, most of these states require judges to have a law degree to run, which is technocratic—you cannot run for a judge position without graduating from law school (and passing the bar in some states) first.

Sure, there are no good solutions and a vast amount of conflicting legal theories on how to address or interpret certain things, but as a whole, the judicial system is at least more grounded in some understanding of the law rather than random individuals who were able to market their way into judicial power.

I imagine a similar thing would happen for other issues.