Weird? No. Objectively wrong? Yes. The link from their switch to your equipment should not be made of copper, because copper does not provide electrical iso

Weird? No. Objectively wrong? Yes. The link from their switch to your equipment should not be made of copper, because copper does not provide electrical isolation between the endpoints and is susceptible to interference. Fiber does provide electrical isolation between endpoints and is not susceptible to interference. Fiber also supports significantly higher throughput.