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We could get rid of genetic diseases without editing the genome. Just screen embryos before IVF.

this does not edit embryos, this only select the ones without defect and trash the defective ones. Very different from editing, especially for couple that only get bad embryos, they'd love to "fix" it.

Or they could use a different source for sperm or eggs, especially that they are supposedly not attached to their own genetic code (being willing to "edit" it anyway).

> especially that they are supposedly not attached to their own genetic code (being willing to "edit" it anyway)

There's a difference between editing and replacing. Imagine my father gives me his watch (which he got from his father, etc.). The watch is fine, but the belt has wear damages and the glass could use cleaning. Doing those repairs doesn't mean the watch loses sentimental value for me, and is markedly different from just getting a new watch.

That's why he said without editing.

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