Surely if scientists are trying to make things happen then 'intelligence' is still behind it?
Not really. It's not like they are trying to make a cell or anything. They are setting up the chemical conditions that existed in a prebiotic earth to observe what happens.
To illustrate. The Giant's Causeway in Ireland consists of regular polygonal columns of basalt that don't look natural. If a scientist can show in the lab that these shapes emerge naturally from cooling magma - they can - then it shows no agency was involved in forming Clochán an Aifir.

The fact that it took an intelligent scientist to set up the experiment doesn't undermine the results.
I would think that it would turn some believers away from their faith in God but I'm sure just as many would stick with their beliefs
I agree. Many believers would deny the reality.
Evolution had a profound effect on some aspects of theology 150 years ago. We now know there was no Adam and Eve and no fall from perfection. Some believers adapted but others are still in denial. I wonder if origin-of-life would be any more challenging.