That $37 wrench SHOULD fit the 9/16 bolt better. Which translates into not stripping the nut/bolt head. Typically they're also harder/stronger, better finish, and will often have other features like size markings you can actually read (whoever decided to start laser markings sockets should be hung). These better wrenches also tend not to bend or flex as much when really reefing on something.
The other thing about 'working' tools is that it's not just about the tool, it's about the warranty/guarantee and service. That $37 wrench what comes off a truck will save the agony of having to stop mid-job to go find a replacement tool for one which is lost/damaged. Often, those same high-end tools can also be refurbished or fixed (when they have moving parts), so 'replacement' doesn't always mean another $150 ratchet - it's often a no-cost proposition and no time lost either.
Also, ever need a tool, only to find that the only shop which carries it, is out of stock? Doesn't fly as an excuse when Karen comes in to pick up her kid-hauler with plans of dragging the munchkins to the next forced-participation activity of the day.. The boss also doesn't tend to like hearing that there's an idle job on the hoist because snot-for-brains forgot he lent his only ratchet which fits to his cousin-in-law last week, and now is now waiting for that booger eater to swing back by with it.
The casual user and shade-tree mechanic can get by with crap tools, and crap tools have their place when it's a one-and-done proposition. But quality tools are definitely better when you need to live with them day in and day out.
