We have members of congress regularly voting on bill that they themselves haven't read and don't understand.
Life is complicated. Legislation addresses thousand of issues, many of which are niche regulations affecting various industries, schools, government agencies, etc. Congress(wo)men can't possibly have expertise on them all.
The fact that ordinary people can't understand them is irrelevant - a regulation on sulfur emissions from coal plants has no meaning to Joe Shmoe. The U.S. is a big complicated country. Having laws only the average citizen understands would put us back in the age of robber barons.
The process (mostly) works because interest groups on all sides have experts who do understand the laws being proposed, and congress(wo)men regularly hear their opinions - including groups representing the public interest like EFF, ACLU, etc. Sometimes their concerns are dismissed, and sometimes congress(wo)men vote on interests besides good public policy (whether as favors to friends, placating donors, getting funding for their district, ideological rejections, etc). But almost nothing is passed without dissenting views at least being heard and considered by the committee.
Given the potential for abuse, it's shocking the system works as well as it does most of time. But it does work fairly well - the system hasn't imploded in 200 years (100 if you count from the beginning of industrial regulation).