An AI recruiting startup raised $100m at a $2b valuation - someone explain (I will not promote)

An AI recruiter startup just raised $100m at a $2b valuation while the founders have not built and scaled something before and are 21-years old. Is this 2022? Someone please help me understand this, this company is a little over 2 years old and 2 of the 3 founders have never built something before. The other founder has, but it never scaled or got acquired (what I can find). No pristine universities (one from Harvard but dropped out in first year?) and one followed 50% of the Thiel Fellowship. I cannot find a single top voice ridiculing this raise so can someone help me understand why this makes sense. I am aware of their 70m ARR but in a second year, is that really ARR? Also that is still an almost 28x revenue multiple, the median valuation multiple for public SaaS companies stands at **7.0x** current run-rate annualized revenue.