Something like a bridge is easily possible with the gravity of our planet. If gravity were twice as strong, we would still have bridges. Orbital rockets are only barely possible (with practical, known chemical propellants). If gravity were twice as strong, we either wouldn’t have them or we would have to use very different methods of propulsion.

Given that it’s just barely possible, you can’t just make things twice as strong as you think you’d need to, just in case something unexpected happens. Anyhow when something moderately unexpected happens, that means you may get a giant fireball like we saw today.