Where your ideas are speculative, the pronouns signal a disclaimer. Where your ideas are solid, the pronouns signal that you may be credited for them. When your friends see your personal pronouns they will know just where they should offer their questions and suggestions. Good scientific papers contain wide ranging statements from ancient axioms and common knowledge to speculations and outright guesses. It is the writer's fault if a casual reader cannot distinguish these types of statements.
Personal pronouns are good words to help keep the distinctions clear.
Use them all and pick the best for each purpose. I don't agree with them. The first wording states a simple fact but the second wording hints that someone else might get a different result. Order of material My papers often describe processes. It is illogical to describe the output before the process which creates it, but that nonlogical approach helps people see where I am going and why I do what I do.