I think will better if we manage money on account with patience, and not enforced to achieved target on daily basis, because trend market also not always same daily, and not yet if facing loss on trading it can making emotion if enforced to making profit with will leading to become trading blindly
Can't say about emotional aspect but setting daily profit target would make life difficult. As you mentioned losses will also happen and so those days pressure would be more for that trader. Weekly, bi-weekly or monthly profit target is ideal in my opinion.