Coming in first place in SRL requires 100% skill. It's not an easy thing to do and many have yet to come in first place, let alone complete the quest, and this event ends on the weekly refresh. Guardians must learn both maps strategically and where to properly cut corners and limit how many gates they can miss while dealing with enemies on the map (including that damn Servitor and Hydras on Venus) and other guardians bumping you constantly. Also, guardians have to deal with the blaring of different horns throughout the race. This requires skill that many don't seem to possess.
Trials, on the other hand, requires no skill at all. Weapons are broken and everyone uses the same one. Gun battles are one sided depending on who sees who first. Grenade burns can kill you when your health is close to full and melees are sometimes OHK while other times it's not, even when you have full armor. There are videos created showing how terrible the trials gameplay is with questionable deaths and kills. Currently, snipers are being overused because of aim assist that turns everyone into a pro. You also have cheaters who lag switch or do other forms of cheatery to get an advantage. Guardians are also being carried constantly, making trips to the lighthouse be less valuable. Guardians can't be carried in SRL.
There you have it. The proof is in the pudding.