Nobody cares about BOD except those who can't deal with the thrice infallible dogma that only validly baptized Roman Catholics go to heaven. BOD was not an issue for anyone before the Americanists made it so, in the XIX century.
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[And flat-earthism wasn't an issue for anyone before Eric Dubay, the atheist, started making YouTube videos.]
Chances are the hypothetical catechumen does not even exist in reality anyway.
And of course, these people are not talking about a real, pious catechumen who dies on his way of getting water baptized....
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Brother Francis used to say that progressivists like to make the exception into the rule. They say, about the image of a tree there before everyone, "I see a tree." Then pushing their finger in to the side of their eyeball, they say, "Now I see two trees."
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You see, their reality is in the mind.
But truth is defined as the conformity of the mind to reality.
So progressivists are opposed to believing the truth. A lot like flat-earthers, actually!
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Regarding BoD, the progressivist likes to jump topic and worry about the "noble indigenous native on a desert island" far away, and whether it's fair that he wouldn't be given Baptism or instruction in the Faith, why, he's most likely to live and die like his ancestors without ever having heard the name of Jesus pronounced. Then Brother Francis would say,
Why would he be selectively concerned about the noble native in a distant land when we can't get the truth into the minds of our next-door neighbor walking on the Boston Common?.