Sorry, but as long as the option to turn it off is there, whatever "toxic" beaviour it might bring it can easily be fixed. We have games with communities in the millions of users, both the users and publishers have thrived with this games, in none of them voice chat was the bringer of doomsday upon those games.
Just look at how the perceptions of people not wanting voice chat are so incoherent. Form mattering to not mattering for gameplay, up to the point from hypothetcial game communtiy collapsing scenarios. Like the option hasn't been available for decades.
The option Nintendo took is not the "safest" it was just the easy way out. That's reality.