EA anticheat is a kernel level anticheat, which are generally bad for consumers due to them giving malware new targets to get full control of an infected system. Genshin Impact's kernel anticheat is famously targeted by ransomware as an easier way to gain control of user's PCs for example. They also don't work on Linux, which is an obvious problem for Steam Deck users.
Actually i've seen a lot of posts (mainly for competitive games) where people just don't want to buy a game without a kernel anti-cheat. Mainly care more about their games being fair than security.