The reason they can get away with it is because too many people use Chrome / Edge / Brave (Chromium based browsers). The free web will survive if companies lose half their customers by not supporting it. It won't survive if they would only lose 0.1% of their customers.

So the key will be to push non-Chromium browsers - get that installed base up. Encourage everyone you know to use a non-Chromium browser. Install a decent browser for your elderly relatives, and spread the word.