@Deneteus @Hcoregamer there are plenty of scientists and PhD's out there who are idiots and/or incompotent outside their area of speciality. Smarts in one area does jot mean smarts In another.
That said, MC has memories of her world from before she got her memories back, orcs being treated as a source of meat does not need to be established, and the lack of reaction from the others when she starts cooking it shows that is IS considered a good source in their world. If it was not a food source they would not have even eaten it.
There are still limits to what she can do, the ability is strong, but costs alot of MP, and she does not have so an invisible house or modern vehicles can be discounted as to high an investment. Plus an invisible house is not without its flaws.
Moving it underground she could do, but is not actually safe without a geological survey to ensure the is stable (and someone from Japan would worry about that since they get a lot of earthquakes)
The punishment for the cowards is the choice of the merchant not MC, and he is kind of the one they hurt so it is his right.
She is running from people yes, but has long since lost them plus you travel faster on a road then off them, there is a reason the Roman's built so many, it also lets her see who is approaching her. It is not a problem unless she plans to never interact with society, which she does not.
This is not idiocy, it is all a case of not doing what you would do. There is a major difference.
@Terrate :
The Hidden dungeon only I can enter.