I'm looking at the issue deeply, not using the superficial reasoning you seem to be engaging in. This reminds me of "mark logic" where if you are promised pie in the sky you commit yourself to believing it even if it's a scam.

Scramjet launchers (and air breathing launchers in general) have been looked at extensively, for decades. They don't make any sense. The math just doesn't work. Here's an insightful post from the Old Usenet that illustrates the difficulty:

https://web.archive.org/web/20220131115058/http://www.island...

When reading that, remember that LOX is 20x the density of LH2 (or 17x the density of "slush hydrogen").