Greetings, aspirants. The purposes of the observation hours are several: to ensure the student knows about the profession before undertaking the training, to prevent wasting a space in a class on someone who is unsuited to the work, and to demonstrate some smarts and initiative to the application committee.
Many program directors of my acquaintance look at the obs hours to determine if the applicant has really done some background on the field, which encompasses so much more than outpatient orthopedics. Working as a tech is fine, but 2000 hours paid does not equal 200 obs hours in three or four different settings - and the references from the PTs in those multiple settings, attesting to your ability to behave appropriately, to treat patients and other disciplines respectfully, and to ask smart questions.
What you submit to the school in your application is your demonstration of your commitment, your drive, and your curiosity. Use this opportunity - and it is absolutely an opportunity, not a roadblock - to become more knowledgeable about the whole of the profession you are considering.
And good luck to you all!