The only reason those Linux laptops exist is because thousands of engineers (mostly volunteers but also commercial vendors like RedHat) improved Linux hardware support to the point commerical system integrators like Dell and System76 could select components well-supported by Linux to make the Linux laptops.

Hypothetically if one-day the performance gap between Apple's chips and the rest of the industry cannot be ignored (contrary to Apple's marketing, it's not there yet) then having Linux well-supported will allow third-party vendors to provide on-going Linux support (because the daunting heavy lifting has been completed by marcan).