Yes, it is possible to have an 80% white organization without discrimination. Perkins Coie is ~80% white but is gender representation is much closer to parity [1], so I'm not sure why you're referring specifically to "white guys".
The relevance of SFFA vs. Harvard is to demonstrate that it's possible to have a substantial overrepresentation - over 3x in the case of Asians at Harvard - despite actively discriminating against the overrepresented group. Whites are only ~1.2x more common at Perkins Coie relative to the general population.
You can keep repeating the line that because a company has X% of Y race it must be evidence of discrimination as many times as you want, repetition doesn't make it true.
The relevance of SFFA vs. Harvard is to demonstrate that it's possible to have a substantial overrepresentation - over 3x in the case of Asians at Harvard - despite actively discriminating against the overrepresented group. Whites are only ~1.2x more common at Perkins Coie relative to the general population.
You can keep repeating the line that because a company has X% of Y race it must be evidence of discrimination as many times as you want, repetition doesn't make it true.
1. https://perkinscoie.com/about-us