The games industry is estabilishing its processes step by step. Year by year. You work on a new feature and you are constantly studying other games. How is that feature implemented there? Why?
Then you discover an article or a video and you see that there are best practices to do that. Maybe a colleague, maybe your own boss show you the best practice. Often time you discover the best practice AFTER you did your breakdowns, your wireframes, your flows, your brainstorming with your team.
Best practices are the best because there is nothing better, right? They are based on facts. On data. On results. On money.
The temptation with best practices is to just implement those, because someone already figured that out. Why reinvent the wheel?
The risk is design something without even understanding why it should work and how to measure its effectiveness. In the meanwhile, a new trend and best practice popped out. Your design is old, maybe you should iterate on that.
Best practices are those things that, when they are publicly available and well defined online, are already surpassed. So that those are just common practices waiting for a new best.