Replace "listening to music" and "headphones" with "working remotely" and it makes a sound argument too:
Some companies and managers don’t like you listening to music. They argue that your headphones will isolate you from possible important interactions with others and that a person who spends their days listening to music cannot do their job well. These are not solid arguments for me. If someone wants to interact with you, they will definitely find a way to get your attention.
And in some countries if you have any kind of music system installed in your workplace you must pay a tax to another companies each month or you'll face a trial by copyright infringement. This can be an endless source of problems if you refuse to pay; and they will suck as many money as they can from your startup really fast.
Some companies and managers don’t like you listening to music. They argue that your headphones will isolate you from possible important interactions with others and that a person who spends their days listening to music cannot do their job well. These are not solid arguments for me. If someone wants to interact with you, they will definitely find a way to get your attention.