There may be 2 explanations.
1. Their Legal Team may have warned them that, under Health & Safety Regulations, there is a risk of scalds to "Third Parties" should the water be dropped. They could be sued for 10s if not 100s of thousands of pounds.
2. Many modern Catering Operations rely on preprepared products and may not have, either a suitable safe container, or a "free-flow" hot water spout.