While I can't speak to anyone else, back when I did tech support as a job for the elderly, one of our policies was to always install uBlock Origin. Our docs even had warnings to remove ABP and similar stuff because they let ads through.

Speaking from a purely personal experience (both before and after that job), the moment you ask me to regularly fix a device for you, I'm going to install uBlock Origin on every major browser you have and finetune it for privacy (aka enable the anti-tracking lists - these days I'd probably also install consent-o-matic to get rid of cookie banners without agreeing to sell all personal data). 99% of the bizarre computer problems people run into is because they clicked on a malicious internet ad and now a ton of PUPs are installed, are probably mining out their personal information or are trying to sell their users on junk subscriptions (this not so entertainingly includes virus scanners, which are almost all perversions of their original selves).

An adblocker is just basic hygiene and allows for the discussion to be on that remaining 1%, which usually is more on boring corporate fuckery from either Apple or Microsoft or the remainder which are the real technical problems people have.

AdBlock is basic hygiene, and I imagine most people have one installed on their desktop these days if they're either barely technically literate or have a family member who is.