"While UEFI is not a fatal block to installing Linux on a PC, computer manufacturers should have told Microsoft in no uncertain terms that while the basic technology to prevent boot sector viruses and the like is a good thing, no version of it would go into production that was not 100% operating-system-neutral, that didn't put Windows and any other operating system offered for x86 computers on an absolutely equal footing."
There are a number of fundamental misconceptions in the above. Firstly, UEFI is not the same thing as Secure Boot, any more than Car is the same thing as Steering Wheel. UEFI is a replacement for BIOS. Secure Boot is one of many features that the UEFI spec supports. UEFI is not a block to Linux. It actually provides features that Linux already takes advantage of, such as GUID Partition Table. This fundamental misunderstanding in your post makes me strongly want to tell you that you need to go back and read more about this stuff before you comment.
Another big misconception in the above is that Microsoft is responsible for UEFI. The UEFI Forum is made up of all the major hardware manufacturers and some OS representatives such as MS. UEFI comes from Lenovo, Samsung, Apple, HP, Toshiba, AMD, Intel and all these hardware manufacturers. Microsoft are merely one of the first to make use of Secure Boot. No Linux distribution is really taking advantage of it but they should. (Red Hat and Ubuntu are using it for their boot loader, but not more than that). Secure Boot is useful and contrary to your post, it is OS neutral. Any OS producer could go to any hardware manufacturer and get their software signed. Red Hat has gone to Microsoft to get signed because Microsoft will do it cheaper for them. Also, MS have required Secure Boot to be disableable by the user on x86 as a condition for Win8 certification. You may not like this, but MS's requirement protects Linux against being closed off.
"As that did not happen, government intervention will now be required."
Your initial argument is based on misunderstandings, so the above conclusion is not shown.
"But Linux doesn't make profits with which to pay for an antitrust lawsuit."
An antitrust suit would fail because it would be groundless. Secondly, Red Hat has an annual revenue of $1.1bn, I have no idea how much SuSE's owners make. Linux is profitable.
"bare-metal hypervisors, like ESXi from VMware, I presume, aren't locked out (or turning off UEFI is no issue for them because hypervisors don't get directly attacked)."
Both parts of the above show a serious lack of understanding of how either Secure Boot or hypervisors or both, work. Seriously, and politely, you don't have the knowledge to be commenting on this and should do some more reading on how it all works.