Indeed. Software is mostly written by young white men for other young white men. Consequently there are loads of under exploited niches, while all the 'sexy' niches are incredibly competitive.
Pick an interest that young white men have. You'll probably find loads of software that caters to it. Pick an interest that an equal number of retired women have. You will almost certainly find a lot less software that caters to it. It is simply because people write software for markets they understand. Most programmers (in my experience) are young white men. A lot less retired women have the skills or motivation to write software.
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