Worth noting about bridges: it takes effort from two sides.
You can construct a bridge a majority of the way from one side towards the other—but, without the consent from the other side—the bridge will remain incomplete.
And an incomplete bridge isn’t a bridge at all.
It’s an untravellable construction site.
How hopeful or desperate you might be for the bridge to be completed is irrelevant.
What’s relevant is the other side’s reciprocated response.
Without that, we might as well build our bridge(s) elsewhere.
Because untravellable construction sites don’t do anybody any good.
Especially not those who commit all of their resources to doing the constructing.