I could see an argument for it being good for a normal set of thieves tools, but MW is far more specialized and besides, it takes multiple tools to do all this work for picking locks, disabling traps. That being said, it does say block AND tackle, two distinctly different parts of a set. Seems to me TAT was made to make it so you don't have to carry a ton of different equipment ie; shovel, block and tackle, grappling hook, crowbar, hammer, saw, etc etc. Not complicated things, because it specifically doesn't cover alchemist tools because they are more sophisticated.