Nothing is going to be lossless… It’s always balance of necessary destruction for greater benefit. If the is a major phase/room sound problem between the kick and the snare - well, you can use a gate, or manually chop - but that has its own destructive effects of cutting down the decay and resonance. So not sure what you’re expecting, magic maybe, but the results are actually significantly good compared to other options when you’re working in the context of “pick your loss”.
If you’re working with a perfectly recorded snare and kick with a proper performance self-mix by the drummer, you’re probably not going to apply this process as a conventional mixing practice.
And at that, you might also use this process as a parallel process combined with a choked punchy gate, a blend of the original track, some dynamic frequency ducking, etc, etc.