The problem is that this minimum transaction size may change in the future. So, lets say you set 10 X MIN_VALUE to equal one stock certificate. If the MIN_VAL

The problem is that this minimum transaction size may change in the future. So, lets say you set 10 X MIN_VALUE to equal one stock certificate. If the MIN_VALUE adds a couple zeroes in the future, anyone with less than 10 certificates just lost their property. Also, maybe you want to allow the user to transfer fractions of your property issue. Stocks can go up 10000x in value and you don't want the issuer to have to perform stock splits. If there is no minimum transaction value, this is easy. With minimum transaction values, the value of a single certificate in bitcoin becomes much more important. The point is, there are valid reasons to transact small amounts of bitcoin that do not involve micro-transactions. If the user is willing to pay the transaction fee, these should be allowed. The developers are limiting the useful (and profitable) application of the network to fix an issue that can be solved by other means.