Big social media companies could offer an API that offers a list of IPs that serve the app and any data it needs from an unblocked source. Then if you're under oppression by a malevolent leadership that blocks a social media, it could be so that you only need to hook your Twitter or Facebook app to internet via Starlink for the millisecond it takes to fetch the unblocked IPs, and the app would be configured to automatically use those in blocked countries. Those new IPs got blocked? Just hit the API again with Starlink and get back to using normal internet. It could be default behavior for the apps in countries where they are blocked to do that if a Starlink connection is up.

If a couple of bytes of information every now and then is too expensive to fetch with Starlink in poorer countries, it is too expensive to use for normal internet use for normal people anywhere on the planet.

Since you are using normal internet except for fetching the IPs, you are not subject to government snooping or sabotage any more than you would be normally. It also would require normal people at maximum the same level of tech-savvyness as a VPN to just connect to Starlink for a second.

Another key difference would be that a VPN requires you to reach the VPN server somehow, and the country can arbitrarily block cable traffic if they have the resources and will. Whether it's technically feasible for most VPNs is another question. But anyway, for Starlink... You would really need to wreck their satellite off the orbit or mess with their radiosignals to block it.

Not that social media companies would do anything to piss off authoritarian leaders / oppressing governments. But they could if they thought it's right