See, your perception of doom is rather skewed because you've gotten into it through contemporary bands. If you want a proper perspective of the genre, you have to realize that it's one that's VERY heavily based on
Black Sabbath worship. Many doom bands today still take plenty of Sabbath influence (
Electric Wizard,
Cough) and the general riffing style that Sabbath pioneered is used quite frequently in doom, many bands merge it with other elements as well, and THAT'S what defines the genre. Not speed. The reason a majority of doom is slow is because to have the proper "crushing" effect, you can't just have the notes whiz by you. Pure doom has a lot of overlap with trad
Heavy Metal, in
Fact, most slow, sluggish trad stuff like
Cirith Ungol and
Saint Vitus is considered doom for those reasons.
Plus, doom really wasn't an established "thing" until
Candlemass and
Saint Vitus defined it as such in the 80s.
Candlemass more or less pioneered the "epic doom" style with Epicus Doomicus Metallicus, and you have the audacity to not even consider them doom?
If you are a false, don't entry, or you'll be burned and died!