"pilots should use....", before you can do anything you need to free yourself from of all the folks who know what you should do.
The FAA does not make Hobbs meters compulsory.
The Hobbs does, however, make completing the aircraft logbook and pilot logbook after the flight simple, and it also acts as a sort of verification of actual aircraft hours if you ever want to sell.
In reality, very few real life pilots are anarchist, barnstorming, Hans Solo cowboy types and most people try and follow the rules, even "suggested" ones, as closely as possible. Sometimes to their detriment, there have been cases of pilots running out of fuel and dying because they overflew a perfectly good but restricted military airbase and did not want to declare an emergency to be allowed to land there.