You're right. You don't have to use snaps. Ubuntu migrates packages slowly in behalf of you.
Using apt to install some packages installs snap plumbing and downloads the package as a snap automatically. You don't have to install it manually.
There's no malicious intent though, it's made to "impose a positive pressure on the snap team to produce better work and keep their quality high" (paraphrased, but this was the official answer).
Installing the inferior snap packages when you apt get is one of the worst cases of a Linux distro refusing to respect the user's intent that I've experienced.
This has got to be the most user-blind self-imposed preference in a modern operating system outside of Microsoft's BS.
If you're going to use an OSS operating system, the control of what is placed on the system should be inherently with the user. If the developer has a question if a new package should be added or is required, throw a prompt and ask -- with a default to not use application containers and the default packaging system.
And one of these migrations broke my workflow substantially enough that a dist-upgrade turned into a complete system reformat to Debian and cost hours that I couldn’t afford.
Using apt to install some packages installs snap plumbing and downloads the package as a snap automatically. You don't have to install it manually.
There's no malicious intent though, it's made to "impose a positive pressure on the snap team to produce better work and keep their quality high" (paraphrased, but this was the official answer).