The OP is describing the status quo on mobile phones and tablets. On mobile Secure Boot, and systems like it, are used to lock out the user. If the boot path integrity is altered, some apps won't work or will provide degraded experiences.
What's happening the article is what has already happened on mobile: it requires vendor signing to run anything on mobile OS and the vendor locks out 3rd party drivers from their OS entirely.
It's yet another step towards desktop computing converging with mobile when it comes to software/firmware/boot/etc integrity attestation, app distribution and signing, and the ability to use your own bootloader and system drivers. When Secure Boot was first rolled out on laptops, it was used by Microsoft to lock the user out of the boot process before it was adapted to let users register their own keys, it can always be used for its original purpose, and how it's currently used on mobile, again.
What's the improved security argument for terminating VeraCrypt's account though? SB does have clear benefits but what is unclear is the motivation for the account termination.
What's the likelihood that this account ban provides zero security benefit to users and was instead a requirement from the gov because Veracrypt was too hard to crack/bypass.
Are the demands that users become experts in provider their own security against more advanced actors not significantly worse? The control part is unfortunate but the defaults should make it so users can focus on sharing pictures of cats without fear or need for advanced cyber security knowledge.