Dima Surmay
Auto-translated
Why do you think it's the last one? The method is clearly described in section 5.10.2. Releasing from prison is a different method.
It is also clearly stated about all other methods - if not 5.10.2, then you're out of luck.
And I'll repeat the "motivational part" - the essence of the rule is to limit overpowered strategies - releasing a hero from prison is much easier than developing him independently, so it makes sense to limit such a lucky break.
I don't fully agree with your two arguments, but I won't write more here, as I think it will only clutter the tournament.