I agree. I workout after work and I barely have time to throw on gym clothes let alone wash my face before getting to class.I work out in the evening after work, so yes I wear makeup.
I feel like it would be more damaging to my skin to wash my face twice, both before and after working out, than to leave the makeup on and just wash after my workout.
If I workout on the weekend or in the morning I don't bother with makeup Besides, no makeup is more attractive than makeup sweating off during a heavy workout. If I don't have sweat running down my face, I consider it recreation, not exercise.