It's not Smart TV apps specifically, it's all free apps. They have to monetize those somehow, don't they? And you get upset when you see ads, don't you?
If you're not paying for the product, you are the product.
If you are paying for the product, you're still the product.
Indeed, if you're a paying customer, there's more incentive to push ads at you, not less, since you obviously have more money to spend. The only winning move is not to p(l)ay.
Yes and no. I understand that Youtube needs to generate revenue, has staff to pay, etc. About a decade ago, I got an occasional 10 second commercial at the start of a clip, and I could live with that. But Youtube pushed me too far when it started playing two consecutive commercials at regular intervals that cannot be skipped, and I now use uBlock or VacuumTube on all my devices.
Basically it's either this or pay for your apps.