Well if it's a cpl strong ppl, then sure you just AAB it dead like with most things. But when you open to public, you're more likely to get ppl that will AAB and do no real damage. In fact, with all the debuffs the boss spams, all they do is end up dying while doing minimal damage to begin with. Their final turns probably just end up healing the boss more than hurting it. Also if one OD is enough to kill you on a D-rag, then your grid/hp is lacking I guess.
Maybe you're an optimist and I'm a pessimist, but I generally expect 99% of the population to be too weak to help.