While true, those issues are present even in system76 and purism. They're even worse because the T500 doesn't have a dedicated GPU or TPM. I know the combination of hardware I have in my T500 has all FOSS drivers and I assume purism is the same.
I have it mostly as a toy and I'm sure most purism customers are the same.
I use a T500 I plucked from the trash for secure libre street cred. No blobs anywhere afaik.