Hence why overall, I think they are highly subject to manipulation either way, and the best way to figure out questions is to do things oneself...
For myself and no doubt many others, this is simply not practical and thus possible.
It's interesting when talking about the further one zooms the further the 'half way' point becomes before the horizon... I've never looked into this before so can't say one way or the other... In any case, this logic can only go so far IMO, as it has to disappear below the horizon at some point no matter how powerful the camera is (and it does because if the Earth were flat you'd see more than just those oil rigs when zooming in and we don't know the base of Habitat either as the poster above mentions).
I think the water tells the whole story and is irrefutable... As a body of water sits flat (like a river, dam or bowl of water) so how can the water at the horizon be higher than Habitat with the base of Habitat sitting in the same body of water being higher than Platform C too... not by a small amount either and at such a large distance the platform he is standing on can't account for that... Only a globe Earth can account for that.
Then I can also practically observe first hand that the Moon and other Planets are all a globe... that we are surrounded by globes, especially when observing the Moon which any cheap telescope even binoculars can do. There are several others too such as Time Zones and the fact that the Earth is fully mapped out... every world 2D map is warped somewhere whether it's 2D Google Maps or other 2D maps of the world... Only Google's 3D Earth is accurate which is why I like using it, I just wish I could enable the live night time and day time view on it again as it was great, but I think you have to login for that now.
There are other 3D Earth maps that do, but they aren't as good as Google Earth ( e.g.
https://www.nightearth.com/ but it's not as good quality, still can get the job done though)... I can clearly see what time of day it is in all locations and the location of the sun and it's accurate... With the Internet and all of us from around the world you can test it in real time and know it's accurate.
IMO we need practical examples using modern technology, so that 1) We're not stuck arguing like it's the 1500's and 2) So that it's practically observable and reproducible for the average person.
These are a couple things that are easily accessible to me and I can easily see and observe which convinces me well beyond reasonable doubt.
God Bless