This sounds like such a bullshit reason to me. Why does preservation fall to the consumer and not the studios that make the game? Hell, OoT is definitely available and doesn't need anyone's help to be preserved as many games are on the 3DS.
There are well over 1500 PS1 games, probably more, that will never be able through a typical digital storefront for years, or decades, or maybe never. The full PS1 library is like 2000+ games or something, and the vast majority are not on and probably never will come to the PSN store.
The same or similar applies to SNES or Genesis games, and the proportion continues to rise for all kinds of old games, not just on consoles but on PC as well and even Arcade platforms.
Even old mobile phone platforms of old that turn to dust people will lose access to those games.
There is genuinely no other way to access the full content of the PS1 or SNES or Genesis libraries without game libraries such as those provided by Redump and other "rom sets."
At least one that is economically feasible for the vast majority of people who would like to revisit those games.
Yes it is wrong to "steal" access to videogames. But this issue is also deeply intertwined with the phenomenon of abandonware.