Thire is an inen that you must always know that hashem is in the room with you. Since you would not do it in front of Rav Chaim Kanievsky so you shouldnt do it.
I know you don’t mean to compare R. Chaim to HKBH, but the way your post is worded…
Nonetheless, there’s lots of perfectly legitimate things that I wouldn’t do in front of R. Chaim (or other respectable people). For example, I would never go into my kitchen, take out the peanut butter, jelly and bread, prepare a sandwich and eat it in front of an odom gadol. Should I no longer eat sandwiches*?
The Wolf
(* No, I’m not talking about eating in general. But while I would eat a formal meal in front of [or, rather, with] an odom gadol**, I wouldn’t eat an informal one. Should I not be allowed to eat a PB&J sandwich?)
(** Not that R. Chaim or anyone else would want to eat a meal with a low-life heretic like me.)