Absolutely true. Also I find it strange that the companies in question could easily resolve their workforce issues by forming a fund to build better/faster public transit to link up their offices with less NIMBY-dominated cities, but choose not to do so.
I don't think the lack of usable rights-of-way explains public transit issues in the Silicon Valley.
Tech companies had very modest participation in the Caltrain PCEP project, and still barely participate in the Dumbarton rail corridor planning, have made no direct moves to expedite or simplify the BART Silicon Valley expansion, have not attempted to improve the performance of VTA light rail, have not publicly tried to pressure the SF city government to expedite or simplify Caltrain DTC, and have made no proposals to make use of vacant or underutilized rail or ex-rail rights-of-way across the Silicon Valley where no NIMBY opposition exists. (Yes, Atherton is famous for its NIMBYs blocking the original HSR construction plan. It's not currently relevant and can be bypassed.)