A robo-advisor cannot put “its client’s interests before their own” because it has no interests.

Goals are determined by a series of questions and responses are driven by algorithms. It is algorithmic suitability.

There is no subject master expertise, insights or wisdom, and there is certainly nothing proactively propulsive with regards to future market activities and/or change preemption.  There is no behavioral coaching.

Trust is a perception based on rational reflections about the future. Can a Robo-advisor have rational reflections about the future or just statistic generalities?

There is nothing wrong with a Robo-advisor.  However, before getting what you pay for you have to know what to pay for.