Well if this would be the case they would do it, the Google would be filled with complains about this company and lawsuits would go their direction.If the nominee director is a signatory to the bank account (which EVERY bank will insist on), then he has access to all of your funds in the account.
If your nominee director has given a general Power of Attorney to you, then he can also take that PoA off you at ANY time and then has access to all of your funds in the account.
Only a thieve believe everyone is a thieve, proper due diligence and trust will be required.