Jujutsu is based around the use of small weapons. Jujutsu is not an unarmed system.
Not all jujutsu is based on the use of small weapons anymore than all Koryu are battlefield systems.
Don't confuse a weapon system (sword knife, stick etc) with a weapon based system. The answers found in Aikido techniques are based around you having a weapon.
The statement that aikido is all based on weapons. is about as illogical as saying that Yaygu Shinkage ryu is all based on empty hand work.
Just cause ya think its so...doesn't make it so.