I think of stickers as partly a theft deterrence mechanism. I expect a thief is more likely to steal a laptop with no stickers, because naively I assume the resale value is higher (no idea if that's actually true).

Losing developer productivity for a few days because a new laptop has to be provisioned, shipped and set up is also not cheap, so I feel there is some value to your employer in you making it slightly less likely for your laptop to be stolen at a conference or coffee shop.