I agree, and those routers can be extremely cheap. I recommend people plug them directly into ethernet whenever possible otherwise speeds basically get cut in half when operating as extenders (just like at home, excepting backhaul).

And in hotels without an obvious ethernet port: check behind the TV. There is usually a less metered port on the wall back there for use by the TV. Sometimes it is restricted, but I've been pleased to find that enough hotels don't have the foresight to do more than simply obscure things a bit.