But I also feel that any random kid shouldn’t be able to just go to these sites and see porn freely.
So they will just go to another site that doesn't have age verification and doesn't implement any security measures instead. Big sites are required to age check people before they are allowed to upload anything, that is not the case for most of the internet.
All age verification does is aggregate personal information and make it easy target for bad actors to steal. Instead of needing to go thought 100 sites, now that information & identities will be tied to a single database.
It's also a slippery slope, since the same adult content is available not just on dedicated adult sites, but mainstream social media. Lemmy, Mastodon, Twitter, TikTok, Twitch (just recently wanted to allow nudity). Do you really want to have your identity tied to your online activity?