Static codes cannot be corrected
A static QR code is a picture of a URL. Once it is printed, the destination is set for the life of the print run. If the page moves, the campaign ends, the URL had a typo, or the site is restructured six months later, every printed copy becomes a dead end and the only fix is to reprint.
This is the most common and most expensive mistake in QR campaigns, and it is invisible at the point the decision is made, because a static code works perfectly on the day you test it.
How a dynamic code avoids that
A dynamic code encodes a short link rather than the final URL. The pattern on the flyer never changes; the record the short link points to is something you can edit at any time.
The same indirection gives you scan counts for free, because every scan passes through a redirect that can be counted. A static code cannot report anything, since nothing you control is involved between the phone and the destination.
Where the design tools genuinely win
QRCode Monkey and similar generators offer far more visual control than Softland does - custom eye shapes, gradients, embedded logos, precise colour control. If the code is a designed element on packaging or a poster, that matters, and it is a real reason to use them.
Those two things are not mutually exclusive. Because a dynamic code is just a QR code containing a short link, you can create the short link here and render it through whichever design tool you prefer. Encode the short URL rather than the destination and you keep both the design and the ability to repoint it later.