Yes, that's clear, and agrees with what AA said, and has been my experience as well.
Humbuckers are designed to use two coils wired in series but out of phase, with opposing magnetic fields so they don't cancel each other out. Takes advantage of a phenomena known as "common mode noise rejection", which was known about and in practice long before Seth Lover ever got his patent on humbucking pickups, and is just another example of how the the USPTO gets played all the time since they're not omniscient. But, I digress.
If the two coils were as large as regular single coils, the output would be far too hot and dark to be useful for anybody but the the heavy death metal crowd. So, the coils are wound smaller, resulting in a more reasonable output. If you try using just one of those coils, it ends up being too weak. Usually doesn't sound too good without some kind of secondary signal processing, which usually ends up as a form of turd-polishing.
Best thing to do is use the proper pickup to produce the desired tonal character. Trying to make a guitar be a jack of all trades inevitably results in it being master of none.