I agree on that assessment. Looks nice, but that section of aluminum in tension is very slim. The most commonly available aluminum being T6061 means it has 40,000 psi tensile strength, per square inch. If we assume T6061, and that section near the thinnest area to be .250 x .250 means an area of 0.0625 sq in. That means that one section can handle an ultimate load of 2,500 pounds pull. If you apply a 4:1 safety factor its quickly down to only 625 pounds force. That does not account for the fatigue factor due to dynamic loading, and aluminum does not like dynamic/fatigue loads. Perhaps it is better because there are at least two sections of similar area taking the tensile load (because of the stay arm on each fork leg). But in this case it is best to plan the load on one section in case one does fail at least the other is hopefully still able to take the load. If the holes were reduced to increase the section to .250 x .500 then the load changes to 1,250 pounds force per section.