This is demonstrably false, ublock lite proves that adblockers can work without it.
Whether or not ublock lite is missing functionalities because of MV3 is irrelevant to the original statement that adblockers need webRequestBlocking.
uBO Lite is missing plenty of features: https://github.com/uBlockOrigin/uBOL-home/wiki/Frequently-as...
Of course it doesn't, if MV2 provided a bunch of edge case stuff that doesn't matter for normal adblocking.
> So your argument is that if an extension could block even a single ad with MV3
That's a silly thing to say. No, it's that if it's blocking 99.9+% of ads it should definitely be considered to be functioning properly. Which uBOL definitely is.
Quibbling over whether it blocks 99.999% or 99.99999% is not relevant to whether it functions "properly". It clearly does.
It can be relevant depending of how you define properly. If it depends on any of those functionalities that are missing, then it’s relevant.