I hate monthly campaign games. It's so difficult to remember things from session to session and almost impossible to slip back into character in any meaningful way. The one more-or-less monthly game I play, I play the most stereotypical dwarf cleric on the planet, for just that reason.
I'm not sure how to phrase this delicately, but ... well, I don't believe that people can't set aside a bi-weekly block of six to eight hours. People can do so, and people can then plan around their commitments. People simply choose not to do so. They place gaming at a lower priority than, say, attending a cousin's wedding, or going boating, or whatever. I'm obviously not talking about actual urgent issues, which of course someone should blow off a game for. I'm talking about choosing not to make a commitment of time to the game, because it's just not that important.
And you know what? That's fine. Gaming is really important to me, and I can absolutely understand how it's not as important to most people. Just do me a favor and be up-front about it. "I'm really not interested in a bi-weekly Friday night game, because I'd rather spend that Friday out at the clubs." Not, "I just don't have time." Because for the vast majority of people, that last statement just isn't true.