I—like most people—don't have a maid. Is Tom Cruise going to break into my house to add a keylogger to my computer without me noticing? If anyone is breaking in, my threat model is worrying about me or my family getting killed, not someone installing an evil bootloader.

Most market segmentation is just to screw customers (e.g. ECC support), but measured boot is one that really only needs to be on enterprise server or workstation-class hardware, and actually causes issues by existing in mass market hardware.