That’s the thing, SDA’s get so caught up trying to be apologetic that they confuse themselves.
Because you’ve been taught that scripture really doesn’t mean what it says, that you must use egw to interpret it.
Do Seventh Day Adventists actually believe that someday their salvation will depend on what day they go to church?", Short answer is Yes. That also means that Jews will also be saved by a day without Jesus.
Is there salvation in Jesus or a day?
What you fail to see in the scriptures you quote are descriptive of the event, there is no prescription or law to keep the seventh day sabbath.
Exodus 20:6-11 Are prescriptions they are not descriptive.