Basically, if all I can read is a headline how can I consider it informative? A news headline has as much evidence as your average Tweet, and can be deeply incorrect through the use of clickbait.
I do use methods to get around paywalls, but knowing that some/most people won’t, it seems counter-informative to solely use the clickbait headline to keep people informed.
If you use the Ublock Origin Extension, you can paste in custom filter lists that block the loading of paywalls I use this one.