A quick run through of some popular distros and reasons you might pick Debian instead of them
Ubuntu - directed fully by a for profit corporation, might at any time go the way of RHEL (Linux Mint already has a mint spin based on Debian in case Canonical shits the bed). Narrower impact on downstream code bases than Debian (though only barely). Ships by default with non free blobs that you must opt out of.
Linux mint - very narrow downstream impact. Not as flexible for how you can set it up as Debian (switching desktop environments is strictly unrecommended, and there’s no real reason to run it as a server)
Fedora - relationship with RedHat is concerning, stability is not there at all
RHEL-alikes (Rocky, Alma, etc) - uncertain future, though it does look like SUSE is going to help stabilize them. Downstream impact is relatively narrow, though you’d be surprised
Arch - harder to install, not as suitable for production environments for stability reasons
Manjaro - horrible stability (worse than arch), not as flexible (like linux mint), holds security patches back, almost no downstream impact
Slack - harder to install, package management is annoying
Kali - not for installing on your machine
Gentoo - see arch
MX Linux - a little more flexible than Mint, but otherwise, see mint
You can sorta say that about most popular distros though
Only sort of and not fully though.
A quick run through of some popular distros and reasons you might pick Debian instead of them
What about openSUSE???
openSUSE Tumbleweed is basically Arch with a Control Panel and an enterprise backing.
And automatic QA testing insuring a higher level of stability compared to arch. Good defaults with byrfs and snapper out of the box too.
What are your thoughts on PopOS?