This stool is fine for anyone who is of average build and weight who wants an inexpensive shop stool for use at a workbench, rolling on a smooth concrete floor

It seems to me from a manufacturing standpoint one should assume a stool is going to be used on a solid floor and one of the most popular solid floors is wood

If you're heavy, your balance is poor, your floor isn't smooth or is easily damaged (e.g. wood), etc