Re: concluded that this is not a security threat
Keep piling on the pressure. Given enough, Samsung will say they've updated their TVs with enhanced trusted device recognition instead of fixing a bug.
Just like their S8s with red tinted screens, that will receive enhanced colour balance controls with a software update. No, it's a bugfix.
Or the pentester that said he found 40 vulnerabilities in Tizen in their Smart TVs a couple of weeks ago. I presume he gave up because he was spoilt for choice and it was like shooting fish in a barrel.
Samsung are everything that's wrong with software development.