I get your point. But if you check the source you’ll notice that they don’t add any code themselves, they simply take Chromium and apply patches from Vanadium (Helium is commented for now) and build an apk. Yes, they call it experimental. Use at your own risk. I have had a very good experience so far - but you may disagree. However, there may be other people like me out there who think it’s a good value proposition.

I’m using this unofficial Helium build. It’s basically Vanadium + Helium patches with Extension support. Ublock Origin works like a charm.