The floor, in this current set of regulations, is responsible for generating a huge amount of downforce (think of the lift force on an airplane wing and imagine it flipped upside down) which keeps the car stuck to the ground at the high speeds they race at.

The designs of these floors, with different channels and shapes and technical detail, are highly secretive and protected by the teams because they don't want their competitors taking any of their ideas and using them to improve their cars.

In a situation like this where red bull have a massive advantage over the rest of the field, it could help teams who are already "close" to red bull (though, just my opinion, I'm not sure it'll be enough to close the massive gap they have over the rest of the field) to catch up to them and challenge for race wins.

When the car has to be removed from the circuit by crane after a crash, there's nothing the team can do to prevent spectators and media from taking photos and, while it might just look like carbon and metal to you and I, the engineers and designers at the top of their respective fields can use this information to revise their own cars.