Why are lovebirds so unloving?

I don't really agree with you. The bird will be what you train it to be. If there are two lovies and one doesn't spend enough separate time for each of them to bond with you, then they are going to bond with each other and won't be as affectionate to the owner. But when keeping a single lovebird and spending a lot of time with it it's going to be affectionate to people as well. I have one who loves being with us, especially my mom as he's decided he likes her the most, and I certainly wouldn't describe him as 'unloving'.