Isn't it the purpose of blackboxes, to abstract me from doing this? I'm here to get the work done and hopefully having to debug only code of my colleagues, why

Isn't it the purpose of blackboxes, to abstract me from doing this? I'm here to get the work done and hopefully having to debug only code of my colleagues, why would I want to waste time on debugging something that should have been battle tested by myriads of people before me? Argument like this almost justifies leaky abstractions as something to be praised.