A buddy of mine who just retired from running a collision repair shop LOATHED GEICO.
Every time I visited, I heard more stories of substandard parts they'd mandated for repairs, or where they'd significantly cut repair times and procedures.
Just like the crappy auto parts nowadays, the profits & savings come out of the Customer.
GEICO isn't the only outfit short-changing repair quality - I had battles with several a few years back - so one has to look at the actual service provided when needed.
I remember well that when I worked for insurers how their accounting was essentially a shell game.