10 years late to the party, but I think the two questions you mention suffer from two things:
- They lack focus
The people who asked these questions do not mention their level of technical knowledge and their requirements (e.g. which programming languages or OS they are using, if they have material or computational constraints, etc.). So the risk for them is to get suggestions of tools they won't be able to use.
Now, you could argue that the answers could be useful to other people than the original poster. The problem (besides ignoring the needs of the person who originally asked the question, which is a bit cavalier) is that it would be useful only to people willing and having the time to explore many answers with possibly a lot of irrelevant or outdated suggestions for their specific situation. I think that either these people are a tiny minority or they don't exist at all, in particular when they have the alternative option to ask a question tailored to their specific situation.
- They are already in the scope of other websites
If we solved the problem above and made these questions more focused, then they would be in the scope of https://stackoverflow.com or https://softwarerecs.stackexchange.com.
Consequently, I don't think that questions about tools with no direct relations to open datasets are in the scope of opendata.SE.