I'd never heard of Gripeless before this thread, but I can agree with your reasoning. We use HotJar's free plan on an interal (engineer-facing) tool and we get

I'd never heard of Gripeless before this thread, but I can agree with your reasoning. We use HotJar's free plan on an interal (engineer-facing) tool and we get very very few reports through it because engineers don't realize there's a text field AFTER the happiness slider. We get an order of magnitude more feedback via Jira even though creating a ticket that way takes 10x more clicks.