Why do you oppose decisions by committee?
For a startup, losing time is death. You're often choosing between option A and option B, and neither will kill the company, but you end up arguing about it forever. If one single person doesn't have the authority to say, "We've argued enough, and now we're doing A," then you'll lose valuable time and die.
Committee gives you a perspective from different people. Which is valuable! Have the meetings if and only if you or them have to go outside the delegated authority to find a solution.