This is why you see more Judo-like movement in Tomiki Aikido than in some other styles. They can initiate, while some others can only respond.What will happen when 2 Aikido masters fight against each other? They both starve to death. Why? Because they both expect the other to make the first move. But it never happens.
This is the main issue of the Aikido system. In general, you have to "give" before you can "take". Aikido expects to take without giving which is not realistic in the real world.