AirGradient hardware is little more than a plastic box and a relatively basic PCB which makes around a dozen connections between few off-the-shelf prototyping components which need direct exposure to room air — they can't be sealed or weatherproofed. Repairability is literally the default state for this class of product; making it less repairable would have required more effort.
Apple devices weren't made difficult to repair because Apple actively despised repairers. They were difficult to repair because Apple lacked sufficient concern over repairability and had other priorities such as as thickness, weight, simplification and efficiency of manufacturing.