That’s my thought on TVs that support casting (so it is probably a smart tv).

I have an old chromecast connected to my parents’ normal tv to avoid smart tvs and possible shenanigans

They used to have good TVs :( It’s a good thing I stay away from Smart TVs in general.

I somewhat envy you. My family does not want even to use the non-selfhosted ones: icloud, onedrive, etc.

I handle problems like photo storage when they need it, but don’t want the preventive measures for data loss, storage space, etc :(