With the low-tech 3-way dimmers, when one end is dimmed, a toggle on the other end can do what it normally does, namely toggle on and off. With these same low-tech dimmers, whilst dimmed at one end, a dimmer at the other end can still toggle, just cannot control the dimness/brightness. It is not necessary to go back to the other dimmer to turn it off unless you have it dimmed to "almost off". The caveat is to not dim it to "almost off" but to click it to full off. It is a training issue.
I have several locations where we want to pretty much set the level and may leave it there, then toggle it on/off from the other end.
The lights over the bed is a good example. Whilst in bed, the dimmer near the bed controls how bright or dim it is. The toggle at the door simply toggles. There is more than just the one light switch at the door so if full light is needed in the bedroom, the other lights are available. If more light is needed above the bed, the dimmer there takes care of it.
Another example is the foyer outside the bedroom. The dimmer is at the MBR door and the toggle is at the other end of the foyer. In the morning, I set the light on dim so as to disturb the wife and to be easy on my eyes. It is at my door for convenience. Infrequent guests don't have the convenience but they do have a dimmer in their bedroom and can simply let that light spill out into the foyer if'n they don't want harsh bright light.
Yet another example is the stairway. I have toggles top and bottom and at a third location, a dimmer. The dimmer is pretty much set-and-forget, and the toggles are convenience.