We perfectly understand people wanting to play with their friends, and we also think that it would be a great thing if we could do that. However, when making a game you also have to make rational decisions based on your team and your budget.
What I'm saying is, it's not like we're AGAINST multiplayer. We thought about it, discussed and scoped the feature, and concluded that based on our current plans we simply can't risk it for our first game. This is not to say it's impossible for future games!