That’s not remotely true for US corporate work. Companies want to protect their investments - progressive discipline policies are set up with the intention of avoiding the liabilities and wastefulness incurred by the hasty decision making of a single individual. Most companies reserve their “at-will” status, but in practice getting fired on the spot for an exception or omission (non-criminal) is pretty rare. Usually there’s a layer or two before outright termination. It took me years to appreciate the fact that my skills and knowledge made me more valuable to a company than a single screw-up could overshadow. Took a lot of stress and anxiety off my shoulders when I did.