PulpFiction what Carmoisine says is true. What you say is not.
I personally know pilots who have had the experience he describes (with Ryanair claiming "typos" in contracts).
Also, you have quoted IALPA as the source of what is obviously stupid advice. You claim IALPA has a motivation for this. Can you enlighten us? In other words, I am asking you to explain and justify your wild claims.