That's simply a justification for performing non compliant work and a justificationfor a slide to the bottom.
If the manufacturer specified that a bolt should be replaced on removal, then that's what any competent mechanic must do or decline the work...
The law is a funny thing as your level of workmanship is not the customers responsability
Simply put, if the customer has a failure because you didn't replace TTY bolts, you will be held liable in a court. The fact the customer didn't want to spend the extra money for new bolts is irrelevant. The law will see you as the expert and will see it as your failure to not do what must be done. That's because they will expect you to do the job to industry standards or decline the job (i.e. not do a substandard job).
But hey, anything for a dollar...