No, they weren't.
Turner created TCM in 1994.
By then, videocassettes and 100+ channel cable systems had already convinced the studios that old movies were not worthless.
Also, many film lovers and Hollywood directors and cinematographers hated Turner, and considered him a philistine, because he colorized old black & white films.
“Also, many film lovers and Hollywood directors and cinematographers hated Turner, and considered him a philistine, because he colorized old black & white films.”
Yes, it is true he colorized some movies — I don’t recall that the colorizations went over too well.
As a businessman it was smart as the color versions could be copyrighted and receive residual fees.
Sorry, but a lot of the MGM films were in serious decay. Many lost.