Is wired connection really needed?

We are moving offices and our third-party IT team is insisting we set up wires for internet speed from our Wi-Fi at the office for our laptops to be plugged into. We are a pretty basic company, 10 employees, light manufacturing; the only big piece of software we run is QuickBooks Desktop. The area has good Wi-Fi coverage. Is it really needed to pay for wires all throughout the office to be plugged into our computers for faster speed? Would prefer to just be wireless.

Looking for a second opinion