First of all, he knows his limitations, like having a good balance between being harsh and caring when necessary. For example, when Tia asked her Uncle if she could go to a party, he didn’t allow her because he thinks that she will have a sex with her boyfriend, Bug. The night of the party, Tia sneaked out and Uncle Buck knew about it so he cancelled his plans and went out to find her, “She’s 15, she’s angry, she’s confused. I need to find her!” If Uncle Buck doesn’t care about Tia, he would’ve just went to the horse race that will provide him enough money for his living. But then he feared that Bug will take advantage of Tia, so he looked for her. Instead of seeing his niece on the bed with Bug, he saw him making out with another girl. After what happened, he saw Tia walking on the sidewalk and told her everything he saw. Therefore, Tia ended up apologizing to Uncle Buck about everything she had done, “You’re right. Everything you said could’ve happened.” By all means, he cares about the kids and loves them so much like his own