Clearly you disagree with the debian stable perspective. That's fine, it's not for everyone. You can just run debian unstable or debian testing, depending on where exactly you draw the line.

If you want the rolling release like distro, just run debian unstable. That's what you get. It's on par with all the other constantly updated distros out there. Or just run one of those.

Also, Debian stable has a lifetime a lot longer than 2 years, see https://www.debian.org/releases/. Some of us need distros like stable, because we are in giant orgs that are overworked and have long release cycles. Our users want stuff to "just work" and stable promises if X worked at release, it will keep working until we stop support. You don't add new features to a stable release.

From a personal perspective: Debian Stable is for your grandparents or young children. You install Stable, turn on auto-update and every 5-ish years you spend a day upgrading them to the next stable release. Then you spend a week or two helping them through all the new changes and then you have minimal support calls from them for 5-ish years. If you handed them a rolling release or Debian unstable, you'd have constant support calls.

...or just leave grandparents on the previous version of Stable until they get a new computer. Honestly not a huge fan of upgrading software at all, if I'm the one supporting the machines.