Take a couple minutes or as much as you need to consider how strong a fork needs to be when the skewer is not able to provide any load support as compared to a thru axle that actually supports the load of the bike and the rider. With a stronger fork and wheel hub connection the forks can be made to minimize their profile and reduce air drag for a road bike and increase the strength for the more extreme situation with a mountain bike going downhill and making a turn.

My electric road bike has 12mm x 110mm thru axles whereas my full suspension mountain bike has a thru axle that is 15mm in diameter and has a cross section that is 56% greater and 56% better able to resist shear load even if the same material and processing is used.

https://hexlox.com/en-us/pages/thru-...hru-axles-2021