Master player here.
Better execution =/= Better analysis.
You can do both at once but also you can do each one better than the other, or both badly but they absolutely have no correlation in majority of cases.
If this means anything to you then this guide was made by a silver player:
And even though their execution level is well to put at best… poorly (based on the gameplay no offense), the analysis that was done in the guide is on point with the current builds of sylvanas.
Another example is the guides about tanking made by a gold/plat player that was shared in the main topic, and yet their analysis is on point with how tanks get played in the highest tiers.
Look I can see your intentions are not to try being elitist but you also should keep in mind that the idea of better physical performance does not mean better mentality/knowledge, you can train your body and become beefy with increased endurance, agility and strength, that won’t affect your intelligence in the process, both are completely independent from one another.
With that said:
This guide analysis are almost on point but still worth the time they spent on, on top of being informative, people learn something from it and it still explains the basics of the game in general for any new player. What they are saying despite their rank is not wrong.