Instead of shrugging it off as 'this is how Okta works', isn't it possible to investigate how we can better the user's experience ?
There have been several threads on this already, information is rather fragmented by now.
I whole heartedly agree with you on the above, and several among us have said the same thing. But here is some more background on your particular points:
I understand there's a security advantage in using MFA (and been using it in other places),
An argument can be made that there is a security advantage for the support site. For the community site, which has thousands of account holders, some of them virtually anoymous, and the content being public, there is near-as-makes-no-difference security advantage in my humble opinion.
The 'remember me on this device' doesn't seem to work
This mechanism also seems to be browser dependent. It has been pretty much established for me that it now (after some intiial issues) quite reliably remembers me for an Opera browser (Chrome engine), but for the company-mandated IE11, it does not work. You may want to try another browser perhaps. But if your IP is changing, such as with a VPN, sadly it's said to definetly won't work at all.
Best regards