Far Cry often has foliage to hide in, and the main places where you encounter enemies have buildings, hills, or other cover. Animals sneak up on you using flora, otherwise you'd be able to kill then before they got to you. Far Cry actually designs around these problems, but it's less repayable because hitscan gunplay is only fun the first time around. Once you lean the strategy, implementing it successfully requires little skill.

What actually made the Doom reboot and Doom Eternal have better gunplay than Call of Duty style games was making damage avoidable through movement alone. In COD style shooters, bullets travel instantly or move too fast to dodge. In multi-player hitscan can work because positioning and aiming takes skill, but in single player games, this isn't the case. It becomes a game of hiding behind cover, shooting until you take damage, hiding until you heal, shooting until you take damage, and so on. It's less repayable and not very deep.

Doom simply made almost every enemy ranged attack into a slow moving projectile. You have few long range hitscan weapons yourself, and your most powerful weapons have disadvantages that prevent long range fighting. However, if you stay close to enemies for too long, they all have fast and powerful melee attacks. This forces you to constantly move and dodge projectiles, attacking enemies with your shotgun before moving far enough away to dodge projectiles again.

What really makes wide open spaces bad in single player shooters is your inability to avoid damage. The best melee based games also make avoiding damage essential to survival. Hitscan shooters just can't do it as easily, instead giving you enough health to get out of the open and behind cover. It's less interesting.