This is not surprising since Martin Luther created his own canon of the bible by his own “authority”, over 1,000 years after it was already set by the Catholic Church at the councils of Hippo and Carthage.
Most Protestant denominations try to downplay sections of scripture that are problematic for their brand of theology and focus on those that could support it. This almost always results in interpretation taken out of context. As you rightly pointed out, the prayers of saints in heaven would be an issue for someone who believes that heaven is empty until the last day and that the communion of saints in heaven cannot pray for us (intercession).
This is why Luther was also suspicious of the books of Hebrew and James - problematic for his doctrine.
Revelation points to past, present and future. Take, for example, the son who was born to rule all nations.
So, anything problematic is “symbolic only”. Otherwise, it might sound too Catholic.