I can and do make the case for spending a lot of money on SaaS products and hiring people. But there is no way in the world I can stand in front of company leadership and ask for money to spend on something that I already get for free. I'd look out of touch with the realities of running a business and the request would be roundly shouted down.
If there's some value I can get then it's a much easier sell. For example, if there is a Babel job board then I can choose to use that over alternatives when I next hire. Jed Watson proposed https://budgetforopensource.org/, which puts this type of thing in the employee perk category so that I can justify it using hiring as a goal. These are things where I can make a business case for spending real dollars, rather than a philosophical argument.