The TelePrompTer critique is not that anyone uses it but that someone like Obama seems to always use it even in moments that don't need to be scripted. Trump has already proven he does not need a TelePrompTer at all. When the tool is called for he can use it no problem. That's the difference.
IF you heard this on the radio you would have been impressed. He chewed out slowly every word. He wanted every word understood and heard.