If your team uses story points (SP) and are questioning their value, or they see value in them but are struggling to accurately estimate their sprint capacity (or likelihood of hitting delivery milestones) using them, there is a simple thing you can try without having to change anything about how you work:
Count stories (SC) in addition to tracking the SP velocity.
Once you have a few sprints of data, do the following:
You can now make an informed decision about a simple first step to improving your predictability — use the estimation unit with the lower COV for capacity planning and forecasting. No conjecture or process change required.