It is a problem for everyone is young white males are the ones building all the technology, because then the only problems we'll be solving is that of young white males. Having diverse teams builds better solutions and tech that benefits everyone in a society, not just the dominant demographics of SV
I suspect you have never stepped inside a tech company in the valley of anywhere else.
There IS a lack of women in tech and especially software engineering roles. This is bad but is something that will change now that computer science is such a popular major. There are plenty of women who are product managers and designers and those are the roles that make decisions about the product.
There is a lack of older people at startups but startups are a young person's sport. I'm in my late 30s and I don't want to be working for startups for the starting my 40s. It's tiring as hell. There are plenty of older people in larger tech companies in SV.
At least for the past 30 years, every software organization I’ve ever even heard of, much less been involved with, was dominated by Asians (Indians in particular). That’s still lacking in diversity, but your mischaracterization makes me feel more like you have a specific axe to grind.
2. Monopolies - See Peter Theil - this is the whole point of any business and not a problem. If you look at a wide enough time scale, startups always have a chance to disrupt - you just need a paradigm shift. Look at what the internet did to Wintel. Monopolies have persisted for MUCH longer periods in industries where paradigm shifts are rare. Look at the cable, wireless or utility industries.
3. Diversity - This is only a problem for liberals - not SV. Since most of SV are liberal this is a problem only by association.
4. Outsiders - Heard of the SV term "domain expert"? SV believes in their value but the ones how are going to push for the change are the rebels. This is not really a problem.
5. Gig economy - Exploiting low paid workers to gain market capitalization is totally a feature of the United States as a whole. SV just figured out how to do it more efficiently. You can't do this in a country like Australia where the minimum wage is $20.