A switch playing breath of the wild non stop for a month would use about 8kwh. I don't know what rates are like where you live but that would cost me about $1.20. If you are looking to reduce your power consumption, the switch is not going to get you there in any meaningful way.
A ps5 uses as much power in 1 hour as a switch does in 18. A mid range gaming pc will use as much electricity in an hour as a switch will in about 30-40 hours.
Mobile electronics use very little electricity and aren't going to cost you very much to operate.
It feels like one of those AI hallucinations that sound plausible if you don't actually know anything about the subject matter.