It is necessary to have safe competition without actual fighting to make use of and develop the techniques of aikido as a modern budo. We can then practise the techniques and train body and mind.
From the view of aikido as a ‘budo of love’ the principle of not fighting in competition is only one aspect of aikido as a budo (naturally it is important for oneself to have an everyday attitude that is not confrontational).
But if we think deeply about the meaning of competition then we see that it is not fighting. It is working with someone else in an objective test of our techniques, mind and body. It is a valuable place where we can practise techniques and pursue our knowledge of budo.
There is a need to have randori where we can practise our techniques against someone who has a free will. Strict rules are necessary to limit techniques and ensure that it is absolutely safe.
It is important to get sufficient practise of the techniques that were excluded from randori for safety reasons. This is because the principles we understand through kata are used in randori and we should reflect on this. Of course, nobody should go straight into competition. Individuals must practise kata and randori according to their physcial strength, age and ability.
We can see that Shodokan aikido has both the theory and practice system.