Honestly if the choice is between no bans and allowing the current trends of radicalization continue, almost any outcome is preferable than what we've seen happen the last 5-10 years.
A point so simple it feels silly to point it out, but here we are.
The rate of spread is a problem of YouTube's own devising based on clicks, views and likes. Remove this gamification and you'll see less engagement, hence less scale of radicalization.
With youtube labeling people "radicals" is a deliberate polarising term designed to do little more than tar and feather people into a specific box. Just like segregation, just like Protestants, just like the German Jews... Etc. It's very unflattering.