Gun manufacturer accountability (or lack thereof) is a complex topic and one with ongoing lawsuits and evolving legal arguments. (In the USA see the Bush-era NRA-backed Protection of Lawful Commerce in Arms Act in 2005 and recent Smith & Wesson Brands, Inc. v. Mexico arguments).
Personally if a gun manufacturer markets a gun with the primary feature being finger print resistant (yes, that's real) and being easy to carry concealed, I think lawmakers should investigate. Likewise f someone makes a big CSAM generator button and puts it in front of millions of users, it also deserves legal attention.
I don't think fingerprint scanner on guns will be effective as it tracks ownership and not legality of usage. However, a number of modern vehicles do have capabilities to perform autonomous actions, including overriding user input.
People don't go after big auto because they sell cars that other people drive. If they suddenly started offering a service where they would drive people around in their cars, and they started crashing into other people, of course they would be responsible for that.