From within the subjective perspective, dietary change is simply the choice to have a new experience within your simulated reality.
When you're having a dream and you become lucid, it can be a lot of fun to follow the plot of the current dream to see where it leads. You do this for the enjoyment of the experience.
The simulation of reality has a purpose -- it helps you grow and develop your consciousness. Often it's better to work within the simulation instead of trying to override it. This way you can experience the gains you're here to make.
Adopting a raw food diet helped me to shift my consciousness and enjoy some tremendous growth experiences. It's a more disciplined way of eating, so it boosted my mental discipline. It's brought much more variety into my life, so my experience of reality has changed a lot. It's created new connections with others who eat this way, so my social life has changed as well. These were all fascinating and enjoyable developments.