Background blur uses significantly less CPU in Google Meet running as a chrome/chromium tab, than in native Zoom Linux client. Besides, Zoom Linux client also makes some arbitrary decision that my more powerful i7-3720QM is not qualified to have background blur enabled, while my less powerful i5-8250U is allowed to do so. Background blur works just fine with both CPUs in Google Meet.
From your POV, perhaps Zoom product/engineering is doing a good enough job. From my POV, what we have is a crappy Zoom Linux client and a half-arsed Zoom web client. And if corporate wants to give everyone Mac and Windows machines only, just so its highly paid engineers and highly paid product managers can share their screen over a Zoom session, who can argue with that logic?