That's not really practice, it's actual experience.
It's also not guaranteed to improve your skills, it might make it worse if you have a bad experience. When that happens it's easy to make generalisations about the next ones. That's actually somewhat descriptive of where anxiety really comes from, antecipating the unknown.
All practice is merely experience. The only way to practice any skill is to use that skill and get better at it.
It's not the same experience.