You're missing the forest for the trees. I don't want to download a bunch of crap so that I can avoid seeing other crap. Eventually the providers will find a way around the crap I installed with more crap, you get the idea.
It is the world we live in, dominated by advertising at every nook and cranny that is disturbing.
So you don't like seeing ads, but don't want to use freely-available tools that will remove them from websites? Digital ads are the easiest ads to remove from one's life
In general, yes. But I've been using uBlock origin on my PC for years now and recently started using it on Firefox for Android as well (they support addons now) and I don't really recall any time where ads slipped through.
Of course excessive advertising and counter measures are always a cat and mouse game but this is once instance where I can blissfully ignore it as a user very easily.