@Sana ***
I said in my comment further down that there have been cases of people being denied entry BUT as a rule those cases have extenuating circumstances and/or involve people gaming the DTV system.
NO immigration officers at passport control are telling people to use Safe Entry.
That's something that the AGENTS are hawking to their clients when they give bogus documentation to show enrollment in a soft power category to get the DTV's issued in another country.