Starting up electronics is generally much harder on them than letting them continue to run. Roku streamers use so little current when idle that most folks just leave them on. They have no native capability of being turned off.
In a seldom used guest room, I have a Roku powered via the USB port on the tv which powers down when the tv is turned off. I'm lucky in that the tv's USB port does deliver enough power to run the Roku reliably, many tv USB ports do not.
On two other sets used daily, I power my Rokus as you are, plugged into the wall outlets, and just let them run 24/7.
It is important to return to the Home page when not watching them, though, so they don't continue to stream in your absence and download programming needlessly.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Do not ask me support questions via private message -- post them publicly to the Community where others may benefit as well.
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