They probably did what they would for most riders riding on narrower rims and tube-type tires. That is exactly what a few bike shops recommended for me a few years ago. They were not wrong though prob a bit high on the recommendation as they usually are. I'm 175 and was on 25m tires then. With wide rims and 28s, I run 72/75 an with even wider rims tubeless and 30/32 tires, I run 53-60. Max pressure- just don't exceed that or the tire could be much more likely to blow off the rim.