the main problem is that adobe software needs to retain info about a clips enclosing camera root folder which it currently does not
That is not true in general. PrPro does retain the info about full path to every asset imported into a project. Otherwise it would be impossible to locate any of them even though they were not moved (renamed etc.).
Yes, it's silly that PrPro doesn't ask about full path while searching for missing media, especially on conditions that it doesn't require a lot of developers' efforts. File a feature request to help it happen as soon as possible.
However, that doesn't eliminate the fact that the OP issue per se can be resolved with understanding searching order.