Legislators' goal to fight money laundering leads to more KYC burdens, which in turn makes any of the companies suffering from more KYC requirements an even more attractive goal to hackers. That in turn leads to more investment in security measures, that again hits the bottom line of those companies and rather leads to larger corporations who can afford security requirements financially, which again leads to further centralization of the industry... That are a lot of in turns, I know, but isn't that the way it will ultimately work out?
This is one possible outcome - a rat race between the security systems of service providers and hackers.
Higher KYC burdens can also have indirect, positive side-effects. They could strengthen completely decentralized services without middlemen, like atomic-swap-based exchanges. This would be of course positive because it strengthens the decentralized nature of Bitcoin, and injects liquidity in Atomic-swap exchanges and services like the (currently struggling) OpenBazaar, which are currently not really popular.
But the problem is that there are companies which are required to do KYC which cannot be circunvented or "decentralized" that easily. For example, real estate services, or "officially recognized" notaries. For these, the centralization effect may have exclusively negative effects.
Also there are people who simply need (or "think to need") a custodial service, because of lacking technical knowledge. These would have no way to get these services without KYC and transaction recording, and thus be even more exposed to identity theft than today.