I imagine what makes it more of a grumble-fest for developers is that these days, a high majority of players will be coming from consoles. While cheaters do exist on consoles, they're far less common, meaning that a majority of your playerbase is using game clients they can't plausibly modify - meaning MOST of the clients can be trusted. So, signing on with something like EAC is really only resolving a cheating gap for a smaller percent of players.

There have even been situations with cheat-heavy games when console players will request the option to disable crossplay in order to assure they aren't matched with cheaters, who are often on PC. Sea of Thieves may have been one such instance.