I feel that it’s safe to share KYC data with Roobet, because they’re taking extra precautions for protecting the user’s KYC details eg using 256 bit encryption, hence there’s very little chance of KYC details ever getting leaked.
The 256-bit encryption isn't an extra precaution but it is pretty much an industry standard, it's being widely used. You can see that Roobet is using it for the SSL/TLS, so it is surely safe in terms of transmitting any data.
Hardly anyone will attack the transport route itself if someone wants to access the data. The encryption of the transmission path therefore plays no/hardly any role. In the past, major hacks always took place in such a way that someone was able to gain access to the system and tapped the raw data there.
Roobet does not store the KYC data in plain text but encrypts it again, but this is not something that Roobet came up with on its own but is required when handling KYC data.