> Any interface with thousands of individual pieces is difficult to use.

Standard libraries considered harmful: 100 interfaces with 10 pieces each are obviously easier to use.

If they are organized into meaningful groups, then, of course: the organization makes it easier to use. Compare: have thousands of name-phone number pairings in any order vs same pairings, but now they are grouped by the first letter of the name? Don't you think that the later is easier to use?