A320 Flare Mode
 

People say that the reason the 320 will automatically start pitching the nose down at 30 feet RA is to force the pilot to flare.

But I still don't see the reason for forcing the pilot to manually flare. Why did Airbus make it this way?

I've heard people saying the plane will just float the down the runway without Flare Mode...

But you're cutting the throttle at 30 feet so how's it going to float down the runway for very long??? And you're flaring anyway...

Can anyone enlighten me?

True! Even conventional aircraft during flare being speed stable pitch down towards the in trim speed more so when the thrust is reduced. In Airbus, being flight path it doesn't happen also In airbus stick out of neutral is g command causes continuous pitch up so pilot will have to neutralize the stick after every aft movement. The flare mode causes artificial pitch down so that during flare and touch down stick can be kept out of neutral as required. It's called the flare mode. Since this mode cannot be effected with certain failures the aircraft is put in direct law to turn it into a conventional aircraft behavior.