People are getting hung up on midi-chlorians again, when what was not the point of bringing up the information in the first place. The original quote even proves the point that was being made about people and the Force.
The point has been hammered again and again. The Force is in all living things and is a thing that can be learned. But you have to be open to it. Some people and species are better at it than others, but everyone can. Sabine has a hard time of it, probably because she is Mandalorian. That is a very different path in life, and it will take a lot of effort to unlearn what she has learned as both a Mandalorian and as a Rebel. That she is at least willing to learn is a start. Ahoska has also seemingly been making a mistake in this training. She's teaching Sabine to be a Jedi Warrior, but Sabine is already a warrior. She doesn't need to be trained to fight, she's known that her whole life. Sabine needs the spiritual training of a Jedi, the teaching Ahsoka would have gotten from Yoda, or Sinube. Patience. Learning to listen to the Force. How to connect to it via the things around her.
We also see Hera hearing what Jacen was hearing via the Force. Jacen clearly has talent for the Force at a young age. Like many children that the Jedi would have recruited to eventually become Knights. Yet it also shows that Hera has a connection with the Force. It may not be very much, but when she quiets her mind and listens, she can hear it. It may also be part of her impressive piloting skills, the Force.
