This person is right. You can openly hate the way the US votes and refuse to be a part of the status quo, but this is how the system works now. If you want your current voting power to have a current impact, then you need to vote in a way that the current system works.
I’m very strongly principled myself, and greatly dislike how petty the voting ideals are. I also greatly dislike how little impact most people have in changing the way we vote. It very much feels like organized systems of corrupt power when you peek into the US system at any angle.
Therefore, if you’re strongly principled like me, I highly recommend that you observe these efforts as different principles:
We should vote in a way that gives us a voice with real impact (present day problems)
We should strive to change and shape both politics and our voting system however possible (present day and future problems)
Make your impact now and for the future. Don’t choose to be silent by not playing the game that is put in front of you. It’s dirty, it’s gross, and it’s political, but it is currently how your voice gets heard. While doing so, also be the change you want to see in the world by pushing for the ideals you are after.