Helix does not aim to be a better vim / neovim. Thus, for example, there are officially no vim bindings and Helix follows the selection → action model. Helix is also a relatively new project.
In my opinion, users who already use vim are not the primary target audience of Helix. I see the target group more among users who want to switch from a "normal" editor to a modal editor. The selection → action model and the easier shortcuts probably make the switch easier for many. I personally don't like vim at all because of the handling (purely subjective view). Helix will definitely not be my default editor but I get along much better with it than with vim or neovim.
When I first tried Helix, my main concern (that prevented me from getting too far into it) was not going from Vim to Helix, but the other way around.
Vim (or sometimes vi) is a standard editor on almost any Linux machine, so if I am ever working on a server if a VM, I would need to know/use Vim keybinds. That made Vim a more useful tool for me to learn at the time, as I could use the skills both on my machine and anywhere else.