How’s that working out for them? Name one tech company founded since Facebook that has been massively successful - ie massively profitable.
Were Linkedin, Instagram, Beats by Dre, WhatsApp, Tableau, Skype, GitHub, MuleSoft all failures because they were acquired for billions, making lucrative paydays for their founders and investors?
Beats by Dre raised less than $1 billion in funding.
https://www.crunchbase.com/organization/beats-by-dr-dre
WhatsApp raised less than $70 million.
https://www.crunchbase.com/organization/whatsapp#section-ove...
From looking at Crunchbase, Instagram didn’t raise any outside funding.
None of the companies you listed raised anywhere near what Uber, Lyft and AirBnb raised.