Why Is Fantasy Baseball Such A Pain In The Ass?

An NFL fantasy pool is like popping into your local for a quick shot and a frosty one while chatting with a hot bartender. An MLB fantasy pool makes you feel like you must have a glass pipe in your pocket at all times.

More specifically, why is it that MLB pool sites that are set to "Start Active Players" put a hitter into your lineup if he is dressed, but not in the starting lineup? If a guy is not in their starting lineup, why the hell is he in my starting lineup. Is it just me, or is this not an obvious option that should be available?

And yes, I know this is a trivial rant about a miniscule issue, but dang it if it don't fry my fritters.

@iggy0865

 One example I can think of is if you are working swing/afternoon shift at your place of employment you can get ROYALLY screwed if you've set your lineup and heaven forbid one or two of your stud players are not playing that day and you were not able to change the lineup due to work obligations. That has BURNED me more than I care to remember!