I am restoring it... hopefully as close to original condition as possible...
I don't see that what I'm doing is any different to taking any car to a garage - they change bearings, clutch, brakes, etc. and anything else that is worn out... And if you have a crash they'll happily replace whole body panels, bumpers, etc.
The only parts I am replacing are those that are worn out, rubber parts that have perished, parts that are likely to be worn out or beyond reasonable use (wheel bearings) and safety critical items like the brake pipes (which go brittle after many years).
All the other parts are being cleaned, degreased, de-rusted and painted ready for re-assembly...