Yes. Mesh systems are excellent for improving wireless coverage, but they still rely on a strong backbone to perform at their best. Hardwiring each access point back to the router creates a more stable connection, reduces latency, and delivers more consistent speeds throughout the home.
Wired connections are especially important for bandwidth-heavy devices like TVs, gaming consoles, workstations, and smart hubs. By keeping those devices off Wi-Fi, you free up wireless capacity for phones, tablets, and laptops, which improves overall performance across the network.