I have doen many bargello patterns, many are done in the tube methods. There are others that have very long strip sets, and some smaller strip sets that are joined.
When I did my first bargello, I really really struggled with the whole tube , and unsewing ... but after about 5 strips , it was so easy it became one of my favorite methods. It does take working thru that first one or at least part of the first one to get it all to "click" for many of us. But once it does .... WOW so much fun.