Hey @code-escapee,
Simply because there are already a lot of well-established platforms on the market doing exactly that — and doing it really well 
Examples: Microns, Acquire.com, etc.
It wouldn’t make much sense to launch yet another solution that doesn’t bring anything new to the table.
As I mentioned earlier, this is a side project, and solving a specific problem for a niche is usually the best way to generate revenue!
Now, the real question is: is this niche too small? No idea — but the only way to find out was to launch something and see what happens 