Is there any real reason why most progranming languages look more like the 3rd panel and not like the 1st panel? Thereโ€™s gotta be a reason for all the nesting and indents that has nothing to do with readability since that shit makes it harder to read.

For programming languages that make use of {}, the reason is (almost always) scope.

Take for instance this:

for i in 0..10 do_thing(); do_other_thing();

compared to this:

for i in 0..10 { do_thing(); } do_other_thing();

In the second one itโ€™s clear you should loop do_thing() and then run do_other_thing() afterwards. The indentation is only for readability in the above though. Languages that use indentation for scope look more similar to

for i in 0..10: do_thing() do_other_thing()