This picture isn’t about breaking Steve’s fingers so you can both play shitty guitar. It’s about making sure you can both access a guitar and lessons to learn.
The equality picture would be shoving a guitar in each of your hands and a coupon for lessons, while failing to address that you live 2 hours away from the teacher while he lives next door.
Eta: equity would be providing you with a free buss ride to the teachers house 2 hours away. This gives you all the tools to get guitar lessons, but, you might not be able to take advantage of this because a 5 hour commitment isn’t the same as a 1 hour 5 minute commitment and you lose out on opportunity cost. You get free guitar lessons and a ride, but the system is broken. Justice is fixing the system so that there’s enough guitar teachers within a reasonable distance. Like say, making sure that no one is more than 20 minutes from a guitar teacher.