Reading a computer screen is harder than reading paper - We need to take this into account, when optimizing digital solutions for
people. Use of structured and annotated information can improve the
overall reading experience on computer screens.
Reading and comprehending are two different things - e.g. when designing for crucial processes like signing a contract
online, a "Tl;dr" could be included in order to check and keep up with
the user's comprehension.
Reading is not as fluid as it seems - Eyes move in quick. sharp jumps with short moments of stillness in between.
That's why centered text is way harder to read for users, than left or
right-aligned text.