modern confusion.

as much as i would like to think of myself as a somewhat cultured person who understands art in some way, i just cant wrap my little head around the idea of modern art.
i went to a modern art museum here while i was in london, the tate modern, and all i can say is they have a nice little cafe on the 7th floor that lets you look out over the thames.
as for the art... i dont get it.
lots of lines and spotty coloring, like they never quite understood their teachers when they said stay inside the lines, well some of them do stay in the lines, but its not technically impressive. especially not the large odd shaped boulders with a coat hanger coming out of it... i never understood what it meant, except that maybe it was meant to confuse all who decided to look and study it. i think it would be fun to just leave something lying around to see if they would admire that as well (not because i think i can be a great modern artist, but because id love to see how these people would respond to that).
but i like dali and picasso.
i just dont understand modern art. it seems like i could make something on canvas and then create a meaning to it and have the same result, except i dont have the pedigree that they do cause they went to college for 4 years to learn how to paint the way they do (is it really art when all it is is a block in a uniform shade of blue? does that stand for anything at all?).
what i will give modern art is that its the type of art that would fit in perfectly in office buildings. but i dont understand any of it, and i really dont care.