There are several differences between the MacBook Airs and the MacBook Pros:
The MacBook Pros have
- Mini-LED backlit screens
- HDMI ports
- SDXC slots
- Active cooling
The 14" MacBook Pro that uses the 'base' M3 chip is similar to the MacBook Airs in that it only has two USB-C (TB) ports, and can only drive one external display.
The 14" MacBook Pros that have Pro and Max chips have
- The ability to drive two (Pro) or three (Max) external monitors
- More CPU cores and GPU cores than models using 'base' M2 and M3 chips
- The ability to take more RAM than models using 'base' M2 and M3 chips
- Three USB-C (Thunderbolt) ports, instead of just two
You say that you do not need a high-performance device. So the differences with respect to ports, and number of supported external displays, and the screen (if you watch HDR movie content) might be more important to you than CPU core counts, GPU core counts, and differences in the maximum amount of RAM.