Yes, actually the move 6 cut isn’t a jump-cut at the waist of the keima, but rather from the opposite direction, and often the direction which is less good shape.
For example, here, if Black extends, White has 2 weak groups. There is a weak point in the kosumi (diagonial) shape at the triangle, and the overall shape is rather weak – Black can usually capture the cutting stones after playing there.
If White protects those stones, Black has miai at this point to capture or severely attack the other stone.
It’s difficult for White to begin this fight as the two squared points are miai and White can’t find the time to fix both, so begins at a global disadvantage. (1 also strengthens Black, giving Black two strong “iron pillar” shapes.
This is the “jump-cut” of the keima, although here it doesn’t work due to the ladder.
Whiite usually has a much better and more solid shape on the top side, with an “iron pillar” on E7 and F7 compared to the weak kosumi shape, though, when cutting this way.
(the kosumi has a lot of forcing moves and squeezes possible against it when it is against two iron pillar shapes like this and 3 is difficult to escape – White will usually lose the cutting stone at
E6 if not the group in that shape)
In this case, and often on the 9x9, starting a contact fight as White in the very beginning gives Black the advantage as the gain from playing one extra move (and playing first in the fight) is very big and often gives Black miai.
It’s usually better to make a base or good shape for the first white stone; or play away on the other side of the board but without making a contact move fight (contact moves strengthen the opponent to some degree also), for example something like this
It would be different, though, if White had an extra stone somewhere helpful, for example here :
The fight looks fine for White as one group has good shape and is comparatively safe at the moment. Black has one weak stone to defend which we can pressure; and we only have to defend the other kosumi stones afterwards, so we are not falling behind in global pace
(although 9x9 opening is complex and difficult to find one of the best/'correct" moves at any level, so it’s not necssarily something easy to read even at a high level
, But those are a few basic concepts)
This “loose net” is not really a very bad move and just leads to more complex fighting if Black escapes, as it doesn’t really surround Black as benjito said.
For example, Black can escape through the gaps like this :
But given that it doesn’t truly capture Black, usually moves like this double hane, or creating a very solid shape attacking the 3 stones, would be better global shape
(the double hane is an urgent mutual key point, and the extend is also a very big mutual key point in the shape for both, compared to a Black move there)