Toally agree with you on most part, but turning your speakers all the way up isn't really the same thing. Limiting is process that affects dynamics and and waveform of a track and you cant affect one thing without affecting the other, that is frequency balance. (Even with most transparent limiter).
If you get any of your tracks released trough some commercial label then its gonna be mastered by their standard, and most of the time there's unfortunately nothing you can do but to hope that mastering engineer will take his job seriously and doesn't have hangover at that time. If you get it to radio then more limiting expected. Those thing might just be out of your hand's so at least you can try and predict them.
Yes loudness war is horrible, but would you decline to get your next big hit commercially released because it was too much limited during mastering?

