It's way cheaper and dure 50% longuer, so i don't know.
Imho it's just another McKinsey idea.
How i envision the discussion:
""" - Most of our illegal immigrants entered legally within our borders, quick find us a new revolutionnary idea!
- Hey, we have this ETIAS idea. bla bla.... .... bla bla... So it's nothing at all like ESTA at all (two hour presentation)
- Nice, here's 5 million """