> Same thing for a lot of sites, probably the vast majority of them.
Once Google gets this in place, it can then perform these checks through their ads SDK and demonetize traffic from visitors that don't pass the check. This will create an incentive for any site owner that wants to make money through ads to enforce that visitors must use an approved browser. Basically the DRM equivalent of 'Please disable your ad blocker'.
Some of us called that out as a slippery slope leading to ubiquitous gatekeeping, but we were shouted down in the name of (as usual) "security."
The bigger concern for me like you call out - major institutions like banks enforcing a separate company's requirements on me in order to interface with them.
Faced with a choice between a vague future threat that might happen (an adversarial ISP or other MIM attack) and a certain future threat that will happen if we let it (incumbent gatekeepers locking down the Web), I'll take my chances with the former, and opt for less gatekeeping rather than more.
"That is because without Web Integrity, there is no guarantee that the site requested is being delivered as the site intends. For example, a browser extension could remove ads or modify content on the page."
See where this slippery slope is heading? We DO NOT want what "the site intends". We want to be in control of the content we consume.