Hi @cabada,
We can send lovelaces, but in the future update. See the comment from people in the Github below:
SebastienGllmt commented on 28 Jul 2020
You can transfer out less than 1 ADA, you just can’t create new UTXO entries that are less than 1 ADA. This is meant to make spamming the network harder. We’d like to have a better system later such as UTXO storage rent (like in Ergo) or a deposit & refund system (like we have for stake keys and pool certificates), but we just haven’t had time for Shelley and it will have to come in a future update