Why wouldn't anyone buy your product? If it is easy to use, and SPEEDS UP RESEARCH TIME, your researcher/PI who is spending thousands on computing clusters will buy your software for their graduate students. Hell, my PI keeps asking me if I need a faster computer so I can run Matlab better/quicker. Really, if I had a software that helped me perform research faster/better/quicker and compare my results to ground truth or gold-standards, that is a much more useful tool than a bunch of hardware for my research. You push out papers fast.
So I disagree with you on your very last sentence (agree with the rest)