Your points are valid and I don't see this as having any present impact on silver supplies.   
It's early-stage proof of concept research.  However, by the time the tech is ready in 5 or 10 years (if ever), there may be a lot of excess panels around, and it may become cost efficient depending on spot price.

Recycling silver won’t be practical except for very large solar installations, where there can be efficiencies in breakdown, collection and transport. There aren’t that many 25-year old large installations.

Too many scattered small installations. Too many logistics and shipping obstacles for the old panels to reach one of the few capital-intensive centralized plants where this process can work.

Obama has never been worth less...what a combo

Solar Panel Mining?