Well, what can I say besides of maybe pilots with too little (flying) to do and therefore too much time to read up on small petty details and post here. This is only
one example, and the posters are normally the same ones...
With one exception all helicopter I have flown, the dual-controlls are very easy to remove/install and thus the opportunity is there to either leave them in with a fellow pilot occupying the other front seat or remove them when having pax in the seat.(in most Ops-manuals a requirement, if they can be removed)
My preference, is to leave them in when I do have a pilot (rated or not, those extra hands can come in handy from time to time) in the other seat, and remove them when carrying pax.
In the big picture, it's the amount of ''stick-time'' that counts to the feel for the aircraft, not the hours in the book, allthough it's those hours you need to
prove that you've done the minimums.