You're talking of an attacker with physical access. This can indeed defeats secure boot, but physical access defeat most computer security. In an evil maid scenario even LUKS can be defeated. An attacker with physical access can clone the drive, install a keylogger (hardware or software) and capture the passphrase the next time the machine boots.
Secure Boot can be useful to prevent malware from inserting themselves into the boot process, preventing them from elevating privilege or gaining persistence https://www.xda-developers.com/secure-boot/
Secure Boot isn't perfect but it's widely available and is an useful extra layer of protection, on top of disk encryption (eg LUKS).
Putting less restriction on social workers seems like a step in the right direction.
The Welsh government isn't the only one in Europe focusing on tweaking rules and on reorganisations, rather than putting resources where most needed.
Let's hope there's more to come to make housing more afforable, eg better regulation of airbnb-style rentals, use tax/insevtives to make housing less attractive to speculators but more accessible to residents.
Public money for social housing can help too, but by itself it won't fix the disfunctional housing market.