Stablecoin issuers require much less regulations because their activity is auditable onchain. If they start misbehaving they get regulated by the free market - people will stop using the given stablecoin and move to a competition.

You think that the free market has regulated or audited Tether? I don't think so, that company is about as sketchy as it is possible to be, and yet it continues to dominate the stablecoin market.

This is not really correct.

When a stablecoin is issued on a public chain then the issuer cannot secretly censor transactions and the activity of the issuer in general is auditable.

You also get access to all the magical DeFi stuff.

Other than this you, as a person, don't need to be aligned with the current political regime you live in to open a stablecoin "bank account". This on its own is a huge breakthrough.