It doesn't seem it is possible to export any contacts out of Samsung SME backups, because these files only contain backups of SMS messages and nothing else.
Convert Samsung Kies SMS backup to vCard contacts file.
We have found 2 software records in our database eligible for .sme to .vcard file format conversion.
Microsoft Windows software - convert sme to vcard on Windows
A free software for managing of latest Samsung mobile devices
Convert from sme file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sme to vcard. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert sme to vcard on OS X
Management and sync utility for Samsung mobile devices