I know it. But you have to pay the cost. Do the mock-up, build an MVP just to get the insight from UX viewpoint. My point of view is that, it's not worth the t

I know it. But you have to pay the cost. Do the mock-up, build an MVP just to get the insight from UX viewpoint. My point of view is that, it's not worth the trade-off here (especially you have only limited time-budget or dev-budget).