Drum corps has never existed in a vacuum. From Civil War colorguard, the post WWI VFW, CYO and American Legion, the baby boom, the flight to suburbia, the completion of the interstate highway system which helped corps to tour nationally, the late 2000s financial crisis: all of these have shaped what drum corps was and what it was becoming.
We are in the midst of a seismic cultural shift in awareness of abuse of power in general, sexual abuse specifically and the almost reflexive tendency of people and institutions to ignore or cover up malfeasance and handle it in-house. I probably don't have to go through the list of people and institutions, but they run the gamut from secular Hollywood to the halls of religion.
Common among the situations, however, is that those who abuse depend upon the fact that they hold both short-term and long-term power over the ability of their victims to do the things they love, or to make a career; the abuser has a respected, charismatic, and often autocratic position and thus the victim is afraid not to be believed, and the victim is afraid that the institution they also love will suffer damage if they speak out. All three of these elements which create the conditions for abuse to happen are present in drum corps.
It would be highly unusual if drum corps was exempted from this reckoning. The Hopkins #metoo moment catalyzed the specific investigations into different organizations. But I believe the question is not 'What is wrong with drum corps?' as if drum corps was a unique case; but, 'How do the conditions which are present in drum corps today aid and abet abuse of power by individuals, just as we see in every other area of society? What checks and balances can be put in place to minimize or eliminate the perpetuation of such abuse?'
This is a far different question than asking about individual actors.
I certainly hope that DCI is able to find the proper ways to address living in the cultural moment. We have seen two extremes in response: the current YEA leadership to the positive, and Roman Blenski to the negative. I think the jury is still out on the current DCI leadership. Whatever one may think of Dan Acheson, he has led the organization through turbulent times and may be able to do so again.
Whatever happens, I don't think the 'drum corps activity' will disappear. But again, far from simply focusing on actors, the above questions, 'what conditions exist which allow an atmosphere where abuse is probable to flourish,' and 'what changes and checks and balances are necessary to dispel this atmosphere?' are urgent, no matter how painful.