The OP argument 'everyone uses it' is also not super rational argument either on it's face - we all 'use food' and 'water' but we pay for those - the former in market terms, and the later is socialized on some level but still paid for by individuals on a usage basis.
1) You'd be happy to have people in villages and in the countryside pay for your transportation, who wouldn't? It's not fair or ideal, to have some people's tax money pushed heavily into systems that don't benefit them.
2) When things are 'free' we tend to use them in a way that does not reflect their true cost. Imagine if toilet paper were 'free' for everyone. We'd probably use a lot more of it, unnecessarily so.
The issue with metros is the intense capital costs and de facto monopoly status.
If there were 20 metros too choose from we wouldn't even think of socializing them, you'd just have to 'pay for it' literally like everything else.
The 'Strategic Advantage' in the metro is that it's actually a very efficient way to move people, but those efficiencies may not be realizable without subsidy.
So instead of 'free' - a reasonable solution might be to subsidize expansion while requiring regular Ops to be paid for out of revenue. Some investment in urban facilities is warranted vis-a-vis the countryside due to the big upside i.e. a large bit of social/industrial gain can be had by government investment that could not be had otherwise.
I've been suggesting this since before all this went down: many left of center folks don't actually believe in free speech; only "correct" speech.
What makes me really nervous is historically, leftist governments have much higher body counts than right wing governments. These types of governments have the commonality that they tightly control speech and thought.
This is all personal as a relative in my wife's side of the family spent half his life in the gulag for having the audacity to suggest Stalin was not a good guy to his drinking buddies (who turns out are the ones that reported him).
If you're on the left (or right), please do some soul searching on this topic. Also consider that it might not be your guy/gal/party who decides what speech is appropriate (and it's a constantly moving target). And in the age of the internet archive, anything you've written in the past is/will be open season. That's pretty scary, at least for me.
Apple uses a lot of customer hostile behaviors nowadays. Recently:
* I canceled the Apple TV+ year trial that came with my iPhone. While, I believe, they require other apps to allow access until the trial ends, they ended my access immediately.
* Apple Music pulls up a slow interstitial almost every time I open it up to try to get me to pay. I have like 4 albums on my phone I listen to, it’s incredibly annoying how they’ve broken the music app to upsell their services.
I’m trying to get rid of most of my Apple devices in favor of anything else at this point.
Apple Music pop-ups are annoying, but I only saw them after some iOS version updates. There's also a setting to hide Apple Music features completely.
For comparison the planned 4.2km Lower Thames Crossing has already cost £1.2bn (€1,400 million) just for the planning phase with nothing built. The French know how to build.