I have to say that I struggle to understand the OP's dislike of being told the pilots' names whilst not being worried about being told the lead flight attendant's name. The lead flight attendant then frequently mentions the first names of their staff in their subsequent PA. Personally I have no problem with either of these practices. To answer the OP my best guess is that staff are told to present a welcoming and friendly face to passengers and that this is part of SOPs.