Yes. There is huge difference between:
a) One Snap package that supports all Ubuntu distros from 14.04 to newest, and also many other distros than Ubuntu
b) Compiling separate .deb package for all those Ubuntu versions from 14.04 to newest.
Chromium has huge amount of code that takes a lot of time to compile.
So Canonical has the resources to make an entire DE, an init system, a mobile OS, a new display server (all of which were dumped on the roadside), and then going all in on a brand new sandboxing/package management system developed from scratch, but merely compiling a web browser officially supported by google and used by nearly every single one of their users is too much work?