A conscientious tradesperson, when talking to others in same trade, ought to be using the correct terms a) to avoid confusion and misinterpretion, b) to demonstrate understanding and c) because it's professional. Not knowing the vernacular can be a quickfire indication that a person may not know how to walk before they start running. You could say its just being anally retentive but wherever you are in your learning journey, it's vital to use the correct vernacular.
Just because that's how they do it, doesn't mean it's correct. There is a reason that the sequence of tests appear in the order they do.
Many electricians will no doubt have stories of times they didn't check the health of an installation prior to undertaking work, only be have a horrific time with the installation because things snowballed.
132.16 - No addition or alteration, temporary or permanent, shall be made to an existing installation, unless it has been ascertained that the rating and the condition of any existing equipment, including that of the distributor, will be adequate for the altered circumstances. Furthermore, the earthing and bonding arrangements, if necessary for the protective measure applied for the safety of the addition or alteration, shall be adequate.
Which leads nicely into 134.1.1 -
Good workmanship by one or more skilled or instructed persons and proper materials shall be used in the erection of the electrical installation. The installation of electrical equipment shall take account of manufacturers' instructions.
How can one claim good workmanship if they've not checked before undertaking the work?
As much as I hate religious teachings; "The foolish man built his house upon the sand" , Don't ask where it comes from, it just fits with the point