The argument of "Would a game developer offer a better answer than anybody else" reflects a much stricter scope than what we allow, here. The general rule of thumb would be to ask if a game developer would be able to answer the question, with a confident and absolute answer.
We do not necessarily apply the rule of "would a game developer provide the best answer.
As I provided, in the comments, a very good example of this is the legal questions we take. A game developer would not be the best at answering these questions; a lawyer would be. However, we still happily accept these questions2. As Tyypii_77 points out, the quoted argument derives from our help center; this quote more specifically applies to programming, but even than, it appears debatable that we should loosen our definitions for pushing these questions to other exchanges. I was personally of the opinion that any such question should be pushed to Stack Overflow; but others have made arguments that have since changed my opinion.
There is a game development context to this question, if you look closer.
I admit that you have to read between the lines, a little, to identify the game development aspect of this question. It actually took a re-read to realise that the original post does not contain any actual mention of game development. However, if you look at the language, it very much sounds like the user is asking in context of game development. In fact, they go as far as to confirm this in the comments. At best, the game development context should be strengthened through an edit to the post; this is an example of where we can save a question, rather than delete it3.
There may be the opinion that the question is too broad, but we can fix that.
Again, this applys to any opinion that the question is too broad. The user is asking for a "best practice"; perhaps there is an absolute best practice. If not, the key is to determine the askers requirements for the "best practice". In such cases, if you feel the question is too broad, ask some probing questions. Work out more specific requirements for what the user is asking. With more specific requirements, it is often very plausible to provide an absolute quality answer to these sort of questions; which generally negates the principle of a question being "too broad".
1 I use the logic of your original comment, as I find it applies to 3D a lot more than "programming" does.
2 You may find a few downvotes for lack of research, but we do not close them, other than as duplicates.
3 The fact that I initially interpret the question to apply to game development leads me to the conclusion that such an edit is, in fact, unnecessary; however, if others disagree, I would not argue against the resulting edit.