Without DV certs, much of the web might not be encrypted at all.
I think few independent site owners would go through the more costly and complicated EV process.
Most independent site owners couldn't obtain an EV certificate even if they wanted to - the process effectively requires that the applicant be a business.
Bingo... that was muchly the case prior to Let's Encrypt's introduction. They single handily changed prevailing practices outside of big tech.