Yes.
There are still oodles of sob stories about hassles and problems using on-line middlemen including the big names to book travel.
It appears to me that the primary reason is that the commissions are small and any adjustments including airline schedule changes mean more work for the agent with no added compensation.
You would have a little more safety if the terms and conditions make the contract with you as taking place in your state and that any dispute needing a fourth party to resolve would be resolved in the city in your state nearest you.