Why should I use my own numbers instead of industry averages?
Because lead value depends on things only your agency knows: how fast you call, which lines you write, your carrier appointments, your commission schedule and how long your clients stay. A published average blends agencies that look nothing like yours. Your own close rate on warm leads is the single most useful figure you have.
If you don't track close rate by lead source yet, start now. Tag calculator leads in HighLevel or your CRM, and after a few months you'll have a figure grounded in your own pipeline instead of a guess.
Retention matters as much as the first sale. A lead that becomes a client who renews for years is worth several times one who leaves at the first renewal, even at the same premium.