It's also a gamble. Money and labor to retrieve the data, possibly out of a seriously damaged vehicle (making it difficult to get to it). And then if you're in a situation where EDR is your best source of verifiability (no eyewitnesses, etc.) you're also gambling that the story coming from your customer was accurate and doesn't increase the liability that you've helpfully provided evidence of.
Fascinating. You'd think that would be the first thing used before any humans even speak.