In short, you can't.
That being said, votes on Stack Exchange sites are indicative of one thing, and one thing only; how the community at large feels about the quality of posts. To quote the tour page:
Good answers are voted up and rise to the top.
The voting system is unfortunately, highly subjective. While I may find your question intriguing, and the goal admirable, others might not and they could reflect that by voting. This means that votes can be given without comments, simply because a user did or didn't like the question.
The downvote in particular has a negative impact to author mentality, but that thought process shifts with more exposure to the site. The likely cause of your downvote was, as @Batphobia pointed out, that your post is currently off-topic because it appears to be asking about developer intent. Specifically, the opening statement:
I wonder who the target audience of Apple Arcade on AppleTV is.
The problem is, this is something that is typically highly unknown to the gaming community at large. As such, it leads to opinionated answers, and, subsequently, misleading information for future readers.
Even rephrasing your question to ask which genres of games would be best for users in specific age groups would be considered off-topic; simply because, the answers would likely be opinionated instead of being backed by scientific analysis.
Also note that your post lacks clarity in that many questions can be inferred from it. For example, a comment already points out three:
...what the target audience is, whether it's suitable for seniors, and which games would be fun for seniors...
Additionally, I personally, partially disagree with @Batphobia's answer where they state:
If you have a specific group in mind, focus your question on if Apple Arcade would work for their specific needs.
Simply because of the statement that follows immediately after:
The goal is to have a question that is answerable by the users of a game/service, not the creators of it.
I believe that simply refocusing to a specific age group's needs would still lead to opinionated answers, and as such would still have a high probability of being downvoted and closed. Instead, I'd refocus to a specific age group (hence the partial disagreement), and then broaden, yet refine by asking for titles that belong to genres known to meet the needs of that age group.
A good way to phrase this would be something like:
According to Awesome Source, the reaction times and attention spans of human beings decrease as age increases:
Some quote about the aforementioned information from Awesome Source to support your claim.
This is because of X, Y, and maybe Z:
Some additional quote summarizing why X, Y and Z are problems.
I'm trying to find games that wouldn't rely on X, would minimize the impact of Y, and still be enjoyable. During my research, I found that the A, B and C genres tend to meet these requirements, but I'm having trouble finding titles available through Apple Arcade (for whatever that reasoning is). What are the top 5 titles in these genres available through Apple Arcade (as of today)?
Notice how by the end of this question, if you have answered nearly everything in the question during your research phase, you're likely to no longer have a question at all because the top 5 titles for specific genres in Apple Arqade is easy information to find.
That should be the goal of a question author, but, this is often not the case. A good question is one that:
- Supplies potential answerers with all of the required prerequisites (if any).
- Clearly articulates a question about a problem.
- Ensures that no additional questions can be inferred.
- Demonstrates an effort to answer the question yourself.
There are more bullet points for other users, but that's often my checklist before I vote.
Hope this helps!