"Oh you know, some of my larger coworkers pushed me down to the floor and told me how much they hated me. But I sucked it up"
"That's great, get over it!"
"I will - until tomorrow, of course, when it will happen again."
"Just keep sucking it up and getting over it and it will all turn out fine!"
I don't know how it is we think children should be able to deal with things that would be unthinkably intolerable for adults.
What makes these situations different is:
A. Maturity. We expect developmental difference and if they don't happen, it indicates a problem. Normal but undesirable behavior at age 2 would sociopathic if done at age 22. Toddlers don't get arrested if they bite someone, while adults do; I would claim that is justifiable.
B. Destructive potential. Mature people are faster, stronger, and smarter; a bar brawl has a greater chance for broken bones, concussions, etc. than a playground fight.
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That said, there are things in relationships you have to suck up and get over at work; they are different than for a middle schooler though.
That isn't even destructive. Broken bones heal and you're healthy again. Bullying a child, that is destructive.