Not so, unless I'm missing something. The DI box, although I think one can use it for the purpose you're implying, is principally, in the case of guitar, for bringing the super-low-level (guitar-pickup) signal up to line level. This is obviously handy when Hi-Z inputs aren't available and one only has the option of using line-level (+4dB) inputs on a desk or interface. Same applies for patching into outboard (line-level) FX, processors and so on. Some mic preamps have Hi-Z inputs, as do many audio interfaces (not mine!), but in their absence the DI box or setting your Kemper to the "Git Studio" setting is your only option.
Balanced or unbalanced, a line-level converter will accept either by the way, so I wouldn't worry about that. The only difference is that long cable runs might carry more noise if unbalanced. For short lengths, which is what you'd usually use in a recording situation (say, less than 10 or 15 ft), there shouldn't be much practical difference.
I'll be using the direct with the "Git Studio" setting 'cause if I go guitar level I'll have to use my lil' ol' Mackie "Guitar" (Hi-Z) inputs to bring the signal up to a level my interface will accept, piping the audio down a direct-output snake from the Mackie to the interface. I haven't done tests as I don't have the interface yet, but my guess is that even 'though there's already an A/D conversion happening in the Kemper using the "Git Studio" option, the fact that I can patch directly from the direct out to the interface, bypassing the Mackie, should in theory mean less noise.
I'll test both methods once I get the interface as the Mackie is quiet and if the noise floor is similar, I'll go the longer route to the interface to save the extra A/D conversion.
Not sure if any of that will help but often I've found that thinking out 'loud can induce epiphanies in those who would dare to listen!
EDIT: The "Mackie" I refer to is a little desk employed for zero-latency monitoring, for the uninitiated.