Your statement actually inline with my sister's friend. She said that as well. They can be seen as shadow only. But I wont close the possibility that others like TS can see them in clearer versions..

You are like my mom, me and my younger brother. To all the people that is asking TS to do this, do that, people that are born with this gift (or curse, depending how you see it), we have different levels of abilities I guess. We are not ghost busters or feng shui master, we all have real jobs (I'm a Quality Manager by training, my mom is an accountant, my brother runs his own business). When I was very young, I told my mom there are strange people outside our house, then my mom know I also have the ability, so from very young age, I was bought to a Thai Monk to learn ways to protect myself. Beside spirits, there are a lot of stuff out there, and some of these beings has immense pressure, and there are beings that are so malicious that you will feel disgusted like want to vomit in their presence.