On the contrary, Minecraft has more tutorials than any other game. Because Minecraft is a fluke, it didn’t need tutorials - it’s viral nature means that the wiki, yt videos, etc all cover that very well.
Also, these days, the achievement system acts as a guide for getting through the different parts of Minecraft. It gives hints at what can be done, and crafting benches tell you what you can make. It’s an integrated tutorial rather than an explicit one.
Single player was in the original design of the game from the start. I keep seeing this said, but it is verifiably incorrect.
IMO, a good game in a Humble Bundle tends to take off, and an MMO not retaining many players after that is a huge red flag about player retention.
The tutorial may not be the main cause, but hopefully the What turns you off playing Boundless? thread has given insight on the most fixable reasons.
I’m not meaning to just disagree with you, btw. I respect your opinions, and just have different ones. 