"We are all teachers."
It would be so helpful if one could actually know what these characters mean. Just hearing the random sound after a few days away is no help to my learning, since I've forgotten any meaning I learnt. So frustrating to have no way to look up meanings. And reporting is just checking a box to say the hover isn't working, which isn't accurate as there is no hover in my exercises.
On a communication level, "we" isn't necessarily all inclusive. A co-worker can tell the boss "we appreciate you" but does that mean each and every co-worker? To emphasize, 都(all) is inserted. Grammatically, 都 must be present when the verb is done by a plural entity. "We" can be a singular group or a group of many persons, just depends on the situation.