In part 2 of the “Is it Really a Black Hole Series”, LPPFusion Chief Scientist Eric J. Lerner explains that any condensed object like the one at the center of M87 must have lost most of its angular momentum for it to collapse in radius. Only electromagnetic forces can remove this angular momentum. The object spinning in the magnetic field produced by its own currents, produced larger and large electrical fields, currents and magnetic fields.
For a highly technical discussion of the role of magnetic fields in the formation of our own solar system, the same process at work in objects like M87, see this pioneering work for NASA by Hannes Alfven and Gustaf Arrhenius. https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770006016.pdf