Forms may be integral to SOME martial arts, but they are not integral to all. And I'll go back to my own forms. There isn't a deeper level to them. I linked together some movements to give folks an exercise they can repeat to work on fluid movement, balance, light cardio, etc. They aren't deep teaching tools. If someone removed them entirely from the system, it wouldn't leave a gap of any kind, assuming they help people in those areas with other exercises.