When the flath-earth craze started I've been trying to at least get that bit actually personally verified. Haven't managed to do it to this day, though. So I'll just keep parroting various things without properly understanding them.
C'est la vie.
Explaining Moon phases gets very complicated in any flat earth model. With binoculars you can see the shadows of craters on the moon's terminator. Or the phases of Venus whereas Mars doesn't have any.
Timezones are ridiculously hard to explain on a flat earth.
A proper theory must explain all of them and no flat earth model can do that. A round Earth OTOH easily does.
Disproving flat Earth does not verify round Earth, after all. And all your listed refutations of flat Earth do not really disprove anything, either. They might, if you do the actual work, but you did not, choosing to just parrot someone that did put in the work.
Which was my point. It is much easier to speak vaguely and reference things than it is to actual prove something rigorously.
There's a difference between "I haven't verified this myself" and "there is no good reason to believe this." You're conflating the two.
But then I've given you a few examples of thought and actual experiments that are very easy to do. That's the opposite of parroting as you can use your own mind to ponder those. But you seem to want to be ignorant, claiming that two theoretical models are equally bad just because you don't want to consider their properties for a second.
I never did a formal proof of it, yet I just use it because it works and I'm pretty sure it's true. Someone else proved it and I'm just parroting that without ever even having bothered to read the proof.
We have 2500 years of epistemology. Individual humans can reach knowledge to various degrees. It’s not a binary state of knowing or not knowing.
There are examples of things written in school books that were just plain wrong because no one bothered to properly verify it. We all settle for "good enough" most of the time.
How do I say this in the most gentle way I can...?
Your brain is broke. No, seriously. If you can help it, try not to argue with anyone about anything, ever. You have a demonstrated inability to think clearly.