Attackers with that level of sophistication could most likely bypass any protective measures the SSD has or find some other way to exfiltrate data, like install

Attackers with that level of sophistication could most likely bypass any protective measures the SSD has or find some other way to exfiltrate data, like installing a transmitter on your RAM. If that's your threat model, then an adversary getting physical access to your device even once should mean it's now unusable anyway, regardless of how secure you think it is. There's just way too many attack vectors.