Yes in a way it's a flaw, or rather a misfeature. Monero solves this by hiding all transaction amounts (and sending/receiving address as well).
The transaction fee isn't set by the amount but the size (a large and small number take the same space). A larger transaction can for example be created by combining many inputs (spending from multiple addresses in a single transaction).
The fee isn't set by miners, but by the user who makes the transaction. If there's competition in the block, which there usually is in Bitoin, then you need to guess a large enough fee and if you get it wrong your transaction can get stuck and not confirm for a while.
The transaction fee isn't set by the amount but the size (a large and small number take the same space). A larger transaction can for example be created by combining many inputs (spending from multiple addresses in a single transaction).
The fee isn't set by miners, but by the user who makes the transaction. If there's competition in the block, which there usually is in Bitoin, then you need to guess a large enough fee and if you get it wrong your transaction can get stuck and not confirm for a while.