But Everything you mentioned as being fantasy is real, except for the dragons of course: Dungeons are real, rogues really existed, potions and spells are also real (look up voodoo in the Caribbean and alchemy in the middle ages?)
Maybe a little less time being kinky in the library and a little more time reading the books would be good.
Truth is stranger than fiction.
Oh Man, you're going to really hate what they did with "Dragon drones" in arctic future and "Power Dragons" in Venus. Never mind how unrealistic it is we would have a cloud colony on Venus... lol... or the turtle artillery in oceanic future, does that count as a mythical beast? So many things are fantastical in the game now whether by Dr Doolittle, Star Trek, or Tolkien standards.
Potions aren't next, they are already in the game, take a look in your inventory. I bet you have yellow ones for coins, orange ones for supplies, red ones for attack, blue ones for defense, and black ones for pirates! Yeah lots of stuff is right up to the line of fantasy, but rogues as a military unit isn't even close to the worst offender. The line complaining about Forge of Empires leaving its historical roots starts WAY back there, somewhere in 2017.