No it's not. Your landing zone is about 1500 feet down the runway for touchdown. What would you do if an aircraft, vehicle, or object was on the runway?? When you cross the fence, you should be able to see the runway environment & decide whether to land or not.
The correct thing you do is go missed approach/go-around & go into holding & talk to SEA Center/ Departure & get things squared away. Knowing the Airfield lightning is required when making an approach to mins & you have to be able to ID those runways lights to call the runway in sight to land.
What would you have done if a vehicle or another aircraft was on the taxiway?? Continue the landing?? No I don't so. Upon idenfiying it not the runway, you do a go-around immediately. Both pilots did a big mistake. No excuse can explain this. Very poor airmanship.
Its BOTH. No airfield lightning at night or in IMC conditions changes your approach mins. NO lights, its go-around time. Complete the missed approach/go-around per procedures, contact approach & get some answers. Simply. You don't have the authority to land unless an emergency is declared & this was no emergency. Poor crew resource management.