This is a sensible argument. The BBT editors and trustees have carefully considered it. But in a book where mistakes are so plentiful, the reverse is equally possible: If the BBT’s present editors didn't fix them, someone later would have.
The BBT trustees could pass a law: “Absolutely no changes.” But trustees who come in the future could just as easily overturn it.
Therefore the BBT editors and editors have chosen a different course, the course followed by publishing houses that set the highest standards for professionalism and integrity: We strive to publish books in editions that fix errors, restore lost material, and thereby stick as closely and faithfully as possible to the letter, spirit, and intention of what the author originally gave.