I disagree. So that “clearly” clearly isn’t a clear at you assume it is.
Look, let’s compare apples to apples – the skill of individual musicians in playing their instruments. In all these musical traditions being a musician is a lifelong job. It might not appear to us that an Indian tabla player is a skilled and talented as a violinist in a symphony orchestra, but that’s just because we don’t have enough experience with the form to tell good playing from bad.
Now, if you judge music purely on how many different types of instruments are playing simultaneous, then, yes, the European orchestra is a unique acheivement. No other musical tradition has produced such a large and varied ensemble. Mozart was given the opportunity to express his enormous talent for complexity because of the accident of the time and place of his birth.
But, I would argue, the arise of the orchestra was largely the result of economic factors rather than aesthetic ones. Supporting 100 full-time musicians is a luxury that’s only possible in a very prosperous society. The rise of the large, varied ensemble that we’re familiar with depended on the existence of a well-off merchant class to collectively fund them.