Exactly. The Lite version is basically "hiding" ads rather than blocking. The MV2 version stops the requests themselves from being made which save your bandwidth and battery. The light version lacks those benefits
Websites get paid.
Users don't see ads.
Sounds like a win-win-win?
If you want a sophisticated version of what you think this is, see Ad Nauseum. It's uBlock Origin except they create a fake "profile" for you and selectively click ads under the hood to throw advertisers off