While I think Phoebe is partially correct to the extent lawyers are able to find loopholes, I think our founders wanted common people to be members of the House of Representatives and were not looking at a government composed of lawyers solely.
I think normal people can write laws and find loopholes too. It's not a skill reserved solely for lawyers. If one is logical and a critical thinker they should be able to do just as well.
In many cases, I think the power argument makes lawyers more dangerous and not less simply because they do know all the dirty tricks and the less ethical ones exploit them. A common person may not be able to do that which makes them safer even if corruptible which we all are.