It's not like people actually prefer incremental change because they like their freedoms a la carte and getting all your basic human rights at once is just too much to handle, it's just that radical change usually seems less feasible and biding your time appears to be a more prudent strategy rather than trying to stir up too much trouble. However, in the current political climate where we are taking giant leaps backwards on race issues, even restoring the 2016 status quo will be deemed unconscionable by conservatives who will fight any effort tooth and nail using all the dirty tricks at their disposal. So if we are going to have to gear up for a prolonged fight anyway, why not actually set some goals worth fighting for?
And besides, you only have to look at the history of this country to see that blacks have only succeeded when they pressed for radical change, using the threat of major upheaval to gain leverage and win relatively more moderate concessions. Whenever they've tried to placate the sensibilities of whites with passivity and compliance, they've only been driven further into the ground.