No. You're not screwed.
The difference is that Springfield Armory has one of the best customer service departments in the industry. He is right, they don't have parts availability like Glock does... no one really does (save 1911 parts).
But if ANYTHING goes wrong.. just give Springfield a call. They will send you a pre-paid shipping label. They will fix it and send it back, all on their dime. They will take great care of you.
This is different to Glock in that... few people actually need their customer service since the parts are readily available and easy to replace. You can do all the work yourself.
Quit second guessing yourself. Just enjoy your gun and let us know how it shoots.