There's also a reason many of the top standard players are top blitz players.
Yes, and that reason is because skills translate in that direction...but not necessarily in the other. A lot of Formula One drivers could be good at driving Go Karts pretty much right away...not so much in reverse.
Daily players do get a boost from all the people that play it like blitz/rapid, though. It's not meant for a hundred games at once., and if you use it as some poor man's blitz without timing out, you will be summarily punished for it whenever you meet a "real" daily/correspondence player.
Daily is excellent for the busy people out there. I know some people who have started chess again because I told them that "Daily chess" also exist.