If people would just behave well, we wouldn't need laws and courts.
When there's a profit motive, someone will always cut corners.
When there's a profit motive, someone will always cut corners.
Once enough people do that, the users install adblockers, which also hurts advertisers who were not filling your screen with shitty, laggy, possibly dangerous ads.
This only works as a specialisation of "people". Where there's no profit motive, people will also cut corners.