Why are ramps controversial?

Why do ramps, which are often seen as a bridge between traditional finance and the cryptocurrency world, elicit such heated debates and controversies? Could it be the security concerns surrounding the exchange of assets between the two systems? Or is it the potential for regulatory arbitrage that has regulators on edge? Additionally, does the lack of transparency in some ramp providers contribute to the skepticism surrounding their use? Understanding the reasons behind the controversy surrounding ramps is crucial for those navigating the complex landscape of cryptocurrency and finance.