Would help too isolate a important system in a fuel effecient way with redundancy added in for landing. But when they put low priority entertainment systems in a position that worst case can effect critical systems does highlight the added risk of being able to watch a movie on the chair infront of you.

Newer jets have wheel well fire "bottles" or extinguishers and sensors to detect problems so the crew can respond appropriately. Aircraft tires are filled with nitrogen for safety. The DC-8 ground crew topped up with air, and not nitrogen, and also flew with under-inflated tires. "Hot brakes" is a relatively common cause of aircraft incidents, and responded to by airport fire services, to avoid major disasters.

In the Swissair 111 crash, the entertainment system didn't have the proper isolating breaker installed, and wasn't fully shutdown once it malfunctioned. Placing the racks in a critical cockpit location near pilot oxygen supply lines, was a major flaw in the system design.

PS. Running out of fuel waiting for "ground landing gears" would be significantly more likely, as commented below.