Because "boring" is subjective and women do not find the majority of men nor what they do attractive. If your life is going to magic the gathering tournaments, cosplay conventions and book clubs every week you'd have a life but would still be "boring guy". Especially since most chick's definition of exciting is a criminal, an abuser or someone spending copious amounts to entertain her.
Its funny tho, almost all of the nikkas i knew who moving some kinda weight had a babymom that was inside the crib 24/7 when she wasnt at work. nikkas be in the crib all day playing PlayStation while waiting for customers yet I never hear girls complaining that they're too boring etc. I rarely hear complaints at all