Put it this way....
If you were a plumber and installed new, to code, in a home and did a good job. Then the homeowner installed a high presure shower system with a booster pump on your plumbing to double the pressure...then the pipes burst in the walls... would you cover it.
I see your point, but let's put it this way....
You needed your house plumbed and made the mistake of hiring a polaris engineer to do it. He did a terrible, not to code, half arsed job that leaked every where even before you installed your high pressure shower system. Now that polaris plumber is going around to all his other clients and redoing his work so he doesn't get run out of town, but won't do yours because even though 80% of the houses he plumbed seize-um-leaked, he claims your high pressure shower system caused the leaks on your water system. Sure
Personally I don't own a high pressure water system, or a dragon, or anything with a polaris engine at all, but I think polaris needs to update all the 800s regardless of shower boosters, unless the shower booster owner doesn't want the update because it won't work with his high pressure system.