Based on my life experiences, I would guesstimate that 87% of guys with low self-esteem have lied about what they do for a living when trying to hit on a girl at a bar. In the short-term, it seems like a smart plan, especially if you plan on ghosting her if it miraculously works out.
"Hmmn. She obviously won't be impressed that I'm a team leader in a call center. I'll just lie and say I'm a doctor instead."