Absolutely not.
Which is all that's required. Simple and to the point (pardon the pun).
And you can offer that as many times as you feel the need to and it becomes valid to you, not to me but feel free to carry on with whatever suits you.
It's pretty simple as to what to expect.
We're told bridge building takes a global curvature into account.
Any two uprights placed into the ground at a level start to the same height will come under the same conditions of a lean back away from each other, no matter how small it is over a short stretch.
A level scope set up on each side facing each other with a pinpoint of a crosshair should miss the scope even at the smallest of angle changes over a short distance.
What you would be looking at is two scopes facing each other and both by line angling upwards, not just one angling upwards.
I think millimetres would be in the many rather than the few.
Once you veer off level your angle becomes more and more veered each way to where they would intersect towards the centre of that angled line of sight and they would not be anything like straight so would offer an easy miss to each scope crosshair pinpoint.
Nahhh. It would be detectable quite easily but it isn't detectable because we simply do not live on a globe which is why it can be just argued away as supposedly undetectable but yet detectable when it suits bridge spans that nobody can measure with any detail due to the way they're built, as in wider at the bottom and thinner at the top which would offer the natural wider gap at the top than the bottom and is easily offered as an argument to those who wish to follow that.
It's not me that offers a parabola, it came from your side. I think Dave offered it for his calculations from his supposed global horizon, somehow.