Let me bring some context before I address your objection
The rationale behind the approach is based upon a principle regarding causation from past events, which was popularized by Charles Lyell who also influenced Charles Darwin and Stephen Meyer, of course. “Lyell argued that when scientists seek to explain events in the past, they should cite causes that are known from our uniform experience to have the power to produce the effect in question. Historical scientists should cite ‘causes now in operation’ or presently acting causes, which would be humans in this case.
This is because experiments and observations in quantum physics have shown that only the conscious observer has the ability to choose which aspect of nature his knowledge will probe. More importantly, they show that minds are non-local, which is another way in saying spaceless timeless immaterial personal cause. For more on this, watch these videos or read the article:
Quantum Biology: Irreducible Mind (Part 4) - YouTube
The Measurement Problem - YouTube
The finer scale of consciousness: quantum theory (nih.gov)
However, I would agree with you that inserting a human observer into the experiment is not enough to establish that a Divine intelligence was the cause because we are contingent beings. This is why another experiment showing an unguided process , in accordance with the second experiment that shows a guided process , is required, which is what we see in origin of life experiments.
If the unguided experiment produces negative results, it would show that there could not be any conscious life before simple life emerged and support the “necessary” attribute of this intelligent designer or conscious agent. This is because “necessity” is an intrinsic attribute of God’s nature, which means showing that God is not necessary in explaining and showing how a particular feature in nature is the same thing as falsifying the God hypothesis. Atheist Physicist ,Sean Carroll, would agree with me and I encourage everybody to watch this video from 3:00 to 20:00 for more:
God is not a Good Theory (Sean Carroll) - YouTube
However, it is important to note that we cannot apply the same reasoning to present day events because humans exist and, thus, could have been responsible for the results equally as well. This is why I will propose other ways to test whether God is still guiding evolution in the present.