It's not just the money. I bought a new LG OLED last year. I didn't care that it had integrated Netflix, YouTube, whatever because I had a chromecast.

But the experience of using the integrated apps is just better. It all just works out of the box, there are basically no ads (some "recommended content", but it's pretty unobtrusive) and I don't need to use my phone or worry about why youtube or netflix have randomly decided not to see the chromecast.