It isn't like we never had security at Airports before. Is your issue with the current implementation or the fact its a government agency instead of private contractors?
Since the rash of hijackings in the 70s its never been possible to simply walk onto an airplane without some security screening.
According to https://www.transtats.bts.gov/, there were 719 million airline passengers last year. The average human lifespan is 79 years.
Assuming each passenger wastes an hour being molested and arriving overearly due to uncertainty about how long the molestation could take, this means the TSA effectively kills over one thousand people every year.