No, for two reasons.
First, we can’t summon infinite money to pay for things. Paying 10X more per bridge means we can build 1/10th as many bridges or we have to start stealing from other budgets.
Second, we don’t know what the needs will be for the bridge in that location 100 or 1000 years from now. It could need to be torn down to be widened. Maybe we’re all riding around in electric vehicles that coordinate perfectly with each other and the bridge isn’t needed for cross traffic any more. We don’t know.
You don't have to wait 100 years. You can build a bridge to alleviate traffic without any understanding that the bridge will in fact generate more traffic, and then you have to widen it a few years later (which also doesn't help). I know this has happened several times in NYC and I'm sure it has happened many other places where engineering know-how far outstrips knowledge of urban planning.
On the other hand having 10 times as many bridges could prove to be an impossibility when maintenance costs come knocking.
Well, invading a few fewer countries could pay for a few longer lasting bridges … it’s a matter of priorities.