Well while the comment was crude and pedantic, there is bit of truth here. On VHF especially, the old phrase "height is might" does apply. You may simply be in a situation where you are not hearing what is out there. When you are in a situation where the 2M band only affords reliable communication just past the horizon, and the fact you are in a rural area, how high your antenna is above ground determines your horizon and just how far you can actually receive. So there is some truth to what the nasty guys says, he just said it poorly. I'm in an area (Greater New York suburbs out on Long Island) where there is always activity due to population density. However, once I put up a yagi much higher than my roof and surrounding obstructions, I routinely make contacts up and down the eastern seaboard, way beyond the horizon. This is due to tropo conditions that are prevalent in the area (which should be even more so where you are located). Previously with my little AR2 vertical in my attic I heard none of that. What you may find is going horizontal with a Yagi (say in your attic), finding ways to reduce your receive noise levels (preamps at the antenna, high quality coax, etc.) and operating SSB there may be more going on out there than you realize. However looking at the geography if your antenna can only go as high as the roof peak of your home, your horizon is up to Cocoa Beach to the north, west to the Kissimmee River (with nothing between you and it really), and Fort Pierce to the south. It's not that there isn't any activity, it's there isn't anybody within your horizon to make activity. You live in a little boxed community with not much around it.