I'm glad you acknowledge that the manga can contradict itself as it can in Tsunade's case. Again, we are not Kishi so I can't say you are right or wrong and vice versa
However I do stick to my claim SCIENCE IS WEAK WHEN ARGUING ABOUT THE NARUTOVERSE
Manga facts > Science
tr.v. re·con·struct·ed, re·con·struct·ing, re·con·structs
1. To construct again; rebuild.
2. To assemble or build again mentally; re-create: reconstructed the sequence of events from the evidence.
3. To cause to adopt a new attitude or outlook
Based on the definition or "reconstruct" that basically means she can make a new body