... as I grow older I have begun to realize how much we just believe what we are told!
Globe-earther here.
Sure, and why not?
To take a simplistic analogy, if the lumberjack wanders back after a day in the forest, and says he cut down 12 trees, do you take him at his word, or go out there to count them?
If there's a logging system run by all the lumberjack corporations worldwide, so that they keep track of all the trees felled, do you take their summarised statistics as true, or do you traipse all over the forests worldwide to check?
There are a myriad of things that you take for granted, every day of your life, without checking them for yourself.
Why would the shape of the Earth be an exception to this? Why would this be singled out for disbelief?