The Lightning network happens to be dominated by LND, running over 70% of the network by some estimates. Most Lightning-enabled mobile wallets use LND, and Lightning communities like PLEBNET direct new users to LND as well.

Lightning Labs has immense influence over the network protocol, and may simply decline to implement BOLT12 even if it is approved as a protocol specification.

https://www.bitrefill.com/lightning-toplist

Source: https://www.btctimes.com/news/the-risk-to-lightning-that-no-one-is-talking-about