Corvids are smart there, is no doubt about it. I'm sure they would use tools if they had the hands to fashion them. They already use things like our cars as a tools when they drop nuts on the road so cars will crack them.
You underestimate them again!
https://www.sciencealert.com/crows-are-so-smart-they-can-make-compound-tools-out-of-multiple-parts We already knew that corvids - crows and ravens - are capable of reasoning cause and effect, solving multi-step puzzles, planning for the future and even fashioning simple tools out of sticks and paper.
But making compound tools is something that has only ever been observed before in primates - specifically, humans and and great apes.
Even young humans take several years to be able to learn this skill, because cognitively speaking, it's actually quite complex. It requires the ability to anticipate the properties of objects, and to be able to mentally map the consequences of putting them together prior to doing so.
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