This is not not paying for tools. A lot of people pay, say, for JetBrains IDEs.
This is more about a critical piece that you want to be always, universally available and known through and through. Choosing a non-FOSS option for a critical piece is now rare, and only works for things which were on the market for ages, and are guaranteed to not go away, such as MS Excel.
If other professions had the option to pick up free toolboxes that aren't necessarily the best quality in the world, but are decent enough, then I'm sure many of them would be pretty damn happy about it.
Even paying for tools at existing 1€ shops is more than many currently do.
ToolHub would need at very least to pay electricity and materials for their replicator devices, and when the bill becomes too high, the shop would close doors.
My point is that it's not exactly a moral failing of a software developer compared to another professional, if the other professional doesn't even have the opportunity to make such a decision
So they get the tools that are available on the flea market, one gets what they are willing to pay for.