There are pros and cons to each type of device. Forearm crutches are light and easy to navigate tight spaces, but offer no support when you need to use your hand(s) for something. They can also put undue strain on the wrist and elbow (surprise, surprise!) Axillary (underarm) crutches are a little more unwieldy, but you can ambulate faster and they offer temporary support if you need to use your hand(s). Risks of course are radial nerve damage from improper use. Walkers, especially those with a seat, can offer the best of both worlds, although they are the bulkiest of the three. They are often considered the safest to use because of their 4-legged stability and if you need to use your hands, just sit down. That said, each situation is different, and there is no "one size fits all" solution. The main thing is, question everything and ask for reasonable explanations for why your physios eschew the walkers. In the end, however, what ever works best for you is the ultimate solution.