Then at least include a small note suggesting all the possible jobs people are looking for. (including data science, machine learning)
Technically who's hiring should encompass everything, but I guess it doesn't occur to people that they can post remote workers in that thread. Similarly I suspect those threads are not attracting data scientist/machine learning engineering since the majority of the posts are not of that category. which is why I started this one. But I do agree that fragmentation is a big problem.