It is hard not to train with kicks, but theexecution often appears sloppy. If, for example, you employ leg traps, you have a free kick on the way in. If a trap doesn't work and your hands are busy, the legs play a role.
It is work getting a hold of a video Max Pallen produced called 'Modern Arnis comes to America;' it contains a lot of back yard footage of Professor Presas in the mid 70s.
Another video worth looking at is the Dog Brothers tape on Krabi Krabong; while a Thai art it shows some interesting real-time integration of kicking with stick work.
I try to have my students work the kciks in as best they can; obviously thosewho start later in life will not devlop the same kicks as the 18-20 year olds. Why? It is not an efficent use of training time to get a 45 year old who has never done much kicking to do mid- to high-line kicks. I could get the student doing it, but for he same investment of time I could have him doing so much more instead. (Of course I have one or two students I thought would never kick at all who now routinely throw a few low-line shots in when we play.)
Chad