FDR's infirmity was due to a specific disease he was afflicted with as a young man
Biden's infirmity is a sign of his mental infirmity. Moreover, this is not new. So its really a sign that Biden achieved nothing on his own, and that he was imposed on America by deep-state actors.
So yes, his infirmity is a sign of very deep problems.
Certainly he’s little more than a useful idiot for the Soroznazi- commie DNC Puppetmeisters. I rather believe he’d still be this way even if he were just 45 and without dementia. Because he’s a corruptoid