The risk is, particularly say in my country, that the actual plot hatched would be: you can’t put the Librem 5 on the mobile phone network.
Obviously my government would have exactly zero authority to stop Purism making devices - but my government can in theory control what devices go on the mobile phone network. In that scenario there is no benefit to me in stockpiling spare devices.
If you ask me, the US government should encourage US companies, like Purism, to make devices - because it is a way of taking back control from China.