How many people are you going to hold accountable if something was made by a team of ten people? Of a hundred people? Do you want to include everyone from designer to a QA?

Accountability should be reasonable, the ones who make decisions should be held accountable, companies at large should be held accountable, but making every last developer accountable is just a dream of a world where you do everything correctly and so nothing needs fixing. This is impossible in the real world, don't know if it's good or bad.

And from my experience when there's too much responsibility people tend to either ignore that and get crushed if anything goes wrong, or to don't get close to it or sabotage any work not to get anything working. Either way it will not get the results you may expect from holding everyone accountable