Yes and no. We used to have rampant script kiddies back in the '90s and early 2000s. After 2005-ish, well maybe 2010, most systems became adequate enough to not trust users' input, bug bounties, security as a separate role, etc, etc.

It would take at least some knowledge to hack, not just a random script from a forum.

Now, with LLMs, it's the '90s all over again.

Whilst true, security will improve rapidly again. Potentially via AI, potentially via other technologies.

If its easy enough to find exploits, its likely similarly easy to scan code for exploits, or use AI-based anti-virus technologies. The only thing holding us back is the cost of compute. We can't all run the latest models against everything.