Certainly not unreasonable. But it does require you to commission your own transport subject to the rules that that private entity seeks to impose. Public entities which indiscriminately service residents and visitors of a given territory would obviate this requirement. But if you're in the US, good luck convincing taxpayers to agree to pay for that.
> subject to the rules that that private entity seeks to impose.
It's not the private entity taking a 3D face scan, nor are they necessarily wanting for that scan to be taken. It's federal laws and regulations being done by federal agents in spaces controlled by the federal government.