They should get special screenings, and if there aren’t because the movie is not rated for all ages, then find someone to look after the kid or just suck it up.
When we had our kid, we didn’t go much to movies because it was hard finding someone to look after her. Most movies, we waited for them to be rentable and then just watched them at home.
Bringing your 0-4 year old kid to a theater is inconsiderate unless it’s for some Disney or Pixar movies or other similar stuff meant for kids, during the morning screenings (at least where I live, that’s the unspoken rule for when to take your small kids to movies).