I plan to use hoses which are properly rated and crimped by a local industrial hose shop. Stainless flex will be too stiff, but there are many other hose types which will meet the need.
As Zee said, this is not a bypass filter setup, it is full flow which its prime purpose is to stop "wrenching" on the filter housing which is plastic and cracks. I believe mine may be leaking now and it's a very labor intensive process so if I'm going to change it out, I'm putting in preventative measures.
Oh I see! OK.
Yes, you are right, there are plenty of more flexible hose options, you simply must ensure the hose is rated for the temperatures of the oil. Most of the leaks I see though are from fittings, so if you're getting them professionally crimped you should be in good shape.