No, poor product management from neglected product managers did that. You might not be very excited to design icons as your primary job, either, if you thought your job was to manage the entire product.

Do we know that's the case, that a product manager did this? Seems odd if they all accidentally designed very similar icons across the products. More likely this was a sweeping design centralisation change.

And do we know they were misled about their roles? You might think "manage" means "lead", but it doesn't.