Different potentials of Stem cells such as unipotent, multipotent and pluripotent.

Unipotent

Unipotent stem cells, meaning that these stem cells only have a limited ability to become one type of cell. Each human body tissue has its own unipotent stem cells:
The heart has  cardiac stem cells
nerves have neural stem cells,  etc

Multipotent

Stem cells are multipotent, meaning they have the ability to become various types of cells that are still in one layer during the early stages of embryonic development. An example is blood stem cells, which can be either red, white blood cells or platelets.  Mesenchymal stem cells  are capable of becoming muscles, loose connective tissue, elastic connective tissue, teeth and bones, and so on

Pluripotent

Stem cells are pluripotent, meaning they can become any cell they want. There are 2 types, namely embryonal stem cells  and IPC /  induced pluripotent stem cells
The existence of the IPC is what makes me say that your statement is no longer relevant, maybe it was relevant 10 years ago, but not now, the issue regarding this has been resolved with the existence of this IPC. In the past, to obtain stem cells with pluripotent capabilities, the only source was embryos, so there were big obstacles from a legal and ethical perspective. Since the discovery of the factors that cause/order a 
pluripotent stem cell to be able to become a certain type of cell, scientists are now able to create stem cells with pluripotent capabilities from mature/differentiated cells (so it is like turning mature/differentiated cells back into cells undifferentiated pluripotent stem). Such cells are called<i>IPC / Induced-pluripotent stem cells. The main source of raw materials: fat cells.