A Preservative also keeps something to last longer than it would do without it.
Being Marketable is a very important factor also.
Like adding CG in 1996, 2004 and 2011?
As nice and as amazing as the original unaltered film is… If it’s rotten or showing moldy bit’s on it you won’t want to consume it.
It’s not an argument I get it. But how many people want moldy or rotten bits.
What are you saying? Why would there have been mold or rot on the ORIGINAL final print? If something happened to a print in the intervening years, the point of a preservation would be to take it back to how it looked theatrically before the damage. I don’t understand your point here in the least. Years of accumulated physical damage to a print and original compositing mistakes are completely different things. Fixing damage would be within the scope of a preservation, correcting “mistakes” 40 years later would not.
A preservation is not a fix all for everyone kind of thing, but the results of a preservation CAN be a launching pad for “fixed” versions that people might like to see.