We can argue about the use of particular phrase correctly or not, but as sailors we (I think) agree that it make sense to call a halyard - halyard and a sheet a sheet. I know I am pushing this a bit to the extreme, but i hope this helps to make the point. One could argue that there is no harm done in calling a halyard - a "red rope on the mast" and a sheet a "blue rope on the side". Or even calling a line used for raising the sail a "sheet" and the one for controlling it a "halyard". Probably, especially, if you sail with the same crew (e.g. your spouse or your family), you could use any name for anything on the boat (and not only on the boat). However, over the years the sailors developed a language with specific meanings for specific things. Not to have fun or to baffle the uninitiated, but because it was critical to know what each line was used for, what each device or piece of gear was for etc. This was critical, because in an emergency there is no time to figure out the ambiguities of what one wants to tel the others.
This is why some of the authors on this forum are arguing and appealing to the rest of us to use the correct terms. If the wise and experienced sailors use the correct terms, the chances are than the new ones, the ones who just join the sport, will start using the correct terms, as well.
If the electrical experts on this forum use Ampere-hours (amp-hours, Ah)) to describe battery capacity, instead of amps (A, unit if current, not energy), the uninitiated would use it, as well (one of my pet-peeves). The difference between Ah and the Colregs is that there is not much harm done, if you use the incorrect term for describing the battery capacity.
mdz