It shocks me so much that publication has become the only metric of a Ph.D.
The 3 paper requirement in the game is also not a formal requirement in most universities--it's more of an implied requirement by individual PhD advisors. FWIW, my first lead-author paper I published a year past my PhD. During my PhD, I produced two relatively large scientific software applications (one open and one closed source) and a few open datasets. I'm now 8 years past my PhD and relatively successful in my field, 90th or so percentile based on common metrics--papers, citations, and funds raised.
Bottom line, papers are important but not the only thing that counts. Outside of tenure-track careers where they are crucial, it's possible to establish yourself as a scientist and be respected by your peers by publishing software and data.