That's ok. If this plan works, a few years down the road Ublock will get dropped/disabled for you under some pretense when Google can claim they've got you covered for "ad blocking".
* Enable Developer Options
* Add Ublock package zip
* Enable in Incognito as well
TL;DR: Them removing it would be a dick move, but not end of the world. We can still install any packages we want.
I commented about it about a month ago[1]
Have you tried Packing them? I have yet to experience this.
Which Google have done to other extensions many times.
As long as there is tech savy people there will be plenty of solutions around.