Many altcoin projects are centralized or not as nearly decentralized as Bitcoin. You often have a leader, owner, a president or CEO that calls the shots. Sometimes you have a foundation or a council that makes the decisions. With all that it's easier to make a decision. If you have one or a handful of individuals who will make the decision about what direction to take.

With Bitcoin, you don't have that one person or a small group that will lead everyone. Many more interested parties are involved. Significant decisions made about the future need a majority vote in favor to be implemented. That's why it's much more difficult to make changes and introduce new features into Bitcoin. We must remain optimistic that egos will be put aside when it is time to make a decision that impacts everyone and everything. Especially if it's a decision that could signal the end of Bitcoin if we don't get it right.