I have heard a lot of people complaining about deleting the Local copy.. It seems to mainly be a bad faith argument where deleting the Local copy just refers to the process of freeing up local storage of unused files(?) repeated by people who doesn't actually use OneDrive but want a unarguable point to why it's shit.
(Mind you I think it's bad enough that Microsoft tries to kind of coerce you into handing them your data)
Indeed. I think that you have to remember that the vast majority of BitLocker users would go from no encryption to encryption with your key in the Cloud. Given the he risk of complete data loss this is imo a decent risk/reward in most cases. You need both the physical computer and the MS account login, and the US government also has the latter.
If you want to make an active and informed decision there is of course much better option s, but know that you would be responsible to keep the unlock key safe or risk total data loss.