Why wouldn't they? I guess I don't see why the question needs to be asked. There are more interesting questions to be asked about how GitLab makes such decisions.
If there's a feature that is mostly only valuable to pointy-haired bosses, then of course there will be people who want that feature to be available for free. But such a feature should be behind the paywall. It will end up funding features outside of the paywall, so the free users have a reason to be happy about it being behind the paywall.
Of course there will be lots of things in the middle, and people will disagree on every aspect of the evaluation. And people will argue that something should be free because it's good for the community when in fact they want it to be free because they don't want to pay for it. Such is the nature of the balancing act that GitLab signed up for, and I respect them for it.
It's a relatively new spin on the ancient balancing act of value creation vs value capture. TANSTAAFL