It will impact. But in the good way. More users will start using LN, more channels will be open, more payments will be done through LN. It's the natural evolution of Bitcoin. Bitcoin as it started could not evolve. Bitcoin without LN it will just die slowly. Bitcoin onchain is not meant to be used as a payment network, but as a store of value. LN could NOT exist without Bitcoin. Is the perfect "symbiosis". Bitcoin onchain is the vault, the settlement. LN is the payment network, your spending pocket.