What you're describing is a bank. People came to bitcoin to be able to handle their own cash and not use a bank - you're missing the purpose here.
This is also money laundering, an illegal activity. If you need to do something illegal to get the bare minimum of functionality out of bitcoin it's not appropriate for business.
It might enable money laundering, but it isn't itself money laundering; and people use Bitcoin for a variety of reasons, including its ability to offer enhanced anonymity in electronic transfers, which this method would further in some circumstances.
This is also money laundering, an illegal activity. If you need to do something illegal to get the bare minimum of functionality out of bitcoin it's not appropriate for business.