I generally am for productive conflict situations. Interesting things come out of debates where people also put passion into what they are standing for.
What is also interesting is that by challenging the team in these debates you indirectly transfer part of your way of seeing the problem.
The more your team is exposed to this, the more familiar your colleagues are with how you approach the problem, what questions do you usually ask, what concerns do you usually have and so on.
In a way, the more you expose your thinking to your team, the more redundant you become.