@ZCore
You're ignoring several facts:
A) There are numerous stories with the FMC who tries this and fails until a certain part of the story or NG+ (regression).
There are tons of book and game universes, that want a certain fate to happen and will railroad that plot one way or another.
B) 99.99% of all people who end up like this are common low-wage job people or NEETs.
I highly doubt you or even most readers have profitable skills to carry over to survive in a totally alien culture to what most modern humans live in.
(No Flush Toilets; No OSHA Standards (nor Food and Safety Standards); No Human Rights for non-Nobles; Hostile to Woman's Rights; No Modern Health Care; No Modern Conveniences; etc.)
C) As mentioned by someone else. If you end up a child, you aren't surviving on your own (especially if you aren't Noble. There is 0 Child Youth Services to look out for you. Worse if you're a girl.)
So regardless of "an adults mentality (software)" your hardware is a Child's brain, with a Child's chaotic stew of hormones and underdeveloped neural pathways / activity.
You're ignoring several facts:
A) There are numerous stories with the FMC who tries this and fails until a certain part of the story or NG+ (regression).
There are tons of book and game universes, that want a certain fate to happen and will railroad that plot one way or another.
B) 99.99% of all people who end up like this are common low-wage job people or NEETs.
I highly doubt you or even most readers have profitable skills to carry over to survive in a totally alien culture to what most modern humans live in.
(No Flush Toilets; No OSHA Standards (nor Food and Safety Standards); No Human Rights for non-Nobles; Hostile to Woman's Rights; No Modern Health Care; No Modern Conveniences; etc.)
C) As mentioned by someone else. If you end up a child, you aren't surviving on your own (especially if you aren't Noble. There is 0 Child Youth Services to look out for you. Worse if you're a girl.)
So regardless of "an adults mentality (software)" your hardware is a Child's brain, with a Child's chaotic stew of hormones and underdeveloped neural pathways / activity.