I'm not a big fan of JRPGs, I kind of feel cheated by them. They promise so much but it's never really what you expected. Honestly, you description pretty much sums up JRPGs, it is terribly linear and you only get to execute choices that are given to you, there is no sense of, "tempt fate" option. Perhaps, that is in a way the appeal of the JRPG for some. The whole, tinkering with the stats and efficiency of execution. There is clearly no room for wasting time with silliness such as multiple choices.
It's a niche of it's own. It's not a niche I would go to, hence I don't play JRPGs any longer but for some it is what they are looking for.