The music is already written down the orchestra play what’s written, so what difference does the conductor make apart from the tempo?
In: Other
If you compare it to say, a 4 piece rock band where everyone is just catching the rhythm and speed from eachother, there are MANY more people involved and trying to eke out a consistent pace between all these people would end up being a complete mess. also they practice their songs much less thoroughly and with less advance notice than a rock band would. This adds up to needing a conductor that can make micro-adjustments (telling the trumpets to swell louder or be a little quieter, picking up the pace slowly or quickly, etc)
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