The reason the Protestant movement is sometimes called the "Protestant Reformation" is because it was originally intended to reform the Catholic church. Nobody contends that Martin Luther or other early protestants woke up one morning and said, "Hey, let's start a brand new church from scratch. No wait, we'll plagiarize from someone else like the Chinese." LOL
Just like many American legal standards have roots from British law (because that is who the Americans tried to reform and when they couldn't they made a new country), so too do Protestants have things in common with our common religious ancestors: the early church. Especially with beliefs in common before Damasus I first asserted in AD 382 that the Roman see had supremacy and was somehow specially seceded from Peter. For example, much of the Council of Nicea (AD 325) is believed by Catholics and Protestants alike in part because it precedes Damasus I creating papal authority from thin air.
TIR — yes, the Protestant groups built on the Church fathers who built on Jewish prophets.
We all stand on top of giants.
It’s like someone trying to build calculus and arguing that 1+1 = 3
and that is what the Adventists are doing - literally in the way they say that everyone else - whether Protestant, Catholic or Orthodox - are going to heck as they have the “mark of the beast - Sunday worship”
As an aside - I remember reading somewhere about why the standard gauge for trains is the way it is - and the reason is that it was based on cart standard gauge.
and the reason for the cart standard gauge is that there were grooves in the road.
And the grooves were from Roman times when the chariots had a standardized gauge :)