I have removed both knob & tube wiring and Aluminum wire, then replaced with Copper, in several residential structures. A few were quite old, predating drywall. Finished with solid wood, plaster or marble walls, which forced me to work through existing holes, utilizing specialty tools & crawl spaces.
Answering your question depends on several unknown factors. Long answer below...
Are the wires in conduit or was cable used? Conduit is easy.
If the original installer correctly secured the cable to the framing, they will not be removed easily. Same is true with the device boxes. The method used to secure the box is crucial, the hardware may or may not be accessible from inside the box. If not, removal of the wall surface may be necessary, where cutting nails & screws are not an option.
Look though my Electrical Rough-in thread, in my signature block below. My cables are stiff and secured (as required) throughout, therefore could not be pulled through holes.
Also. How would we secure the replacement cables through a hole? What cable connectors will we install, from inside the box? Conductors flopping around and dangling inside of hollow kindling is a recipe for disaster. Even inside a stationary, slab-build home, unsecured wireruns are not acceptable.
Does installer remember where each cable and staple was placed? We might swiss cheese the finished surfaces to achieve the goal.
With drywall, we cut patchable holes, near the stud, just above each device and near the top (or bottom) of the wall in order to access the two staples, which are required, to remove the existing wire and replace it with new. (The old wire will otherwise obstruct the new).
In a home, it's fairly simple (for an experienced Electrician) and requires one worker in the attic or under the home whilst the other works inside.
No. I would not attempt this method on a skoolie unless all of the impeding surfaces were removed for access.
Maybe we can offer another way. Why will you remove & replace them? What is the end goal?