How does the average consumer feel about plugging something other than the OEM adapter into a router? Things always say "Use only the original power supply", m

How does the average consumer feel about plugging something other than the OEM adapter into a router? Things always say "Use only the original power supply", maybe they underestimate people's intelligence and think they will be too afraid to put the UPS in between? I'd really like an affordable 5v/12v UPS though. Maybe it will happen when more things adopt USB-C and there's more of a market for power banks designed for seamless switching.