All mobs can randomly look at Creative Mode players. Only for a few seconds, and then they  look away.

However, Pillagers  just keep staring at you and never look away.

How to test this:

Change gamemode to creative.

Spawn a Pig, a creeper or a villager for example.

See how it looks at you, and also looks away.

Then test with a Pillager. The Pillager keeps staring at the player without ever looking away