"They are a highly disciplined and enterprising people, having centuries of experience with warfare in their homeland. Their warriors are acknowledged to be among the best in the world. The Redguards are also known for their naval prowess, and their fleets have proved a match for the Empire's best armadas, as seen during the Stros M'kai revolt.http://www.uesp.net/wiki/Lore:Redguard#cite_note-Redguard-14 Stros M'kai and some parts of mainland Hammerfell hold many http://www.uesp.net/wiki/Lore:Dwemer ruins, and some young Redguards seeking to enter military service must brave the dangers of these ruins.http://www.uesp.net/wiki/Lore:Redguard#cite_note-PGE1Ham-0 Most of their holidays and traditions seem to revolve around either the celebration of natural phenomena or the commemoration of great battles and warriors.http://www.uesp.net/wiki/Lore:Redguard#cite_note-HOTIB-2http://www.uesp.net/wiki/Lore:Redguard#cite_note-RTHATH-15http://www.uesp.net/wiki/Lore:Redguard#cite_note-G-16"
Why are you using a UESP article to argue a point when Parzival has already quoted the source material for that article? The Pocket guide only specifies the practice of entering dwemer ruins as being done by one knightly order in totambu. Furthermore, the context of that quote shows that the dwemer ruin part isn't even what's important.
There is no standing army in Hammerfell, only paid militias of the oft-contested border-states and along its coastline. Ancient tradition has predisposed the Redguards to knightly orders, though, customarily in the service of royal families. Initiates of these orders must prove themselves in dangerous, even deadly, tests of skill. The youths of Crown Totambu, for example, must sail to the Dwemer Ruins of Stros M'kai, to avoid its deathtraps and "wrestle its mechanical men back into shape" before they can join the Knights of the Scarab. The more severe Order of Diagna, on the other hand, stages an annual recreation of the Siege of Orsinium, where their initiates must play the part of the Orcs....
As the full quote shows, the knights of the Scarab don't send potential recruits to the ruins at Stros M'kai because they find the Dwemer interesting. They send potential recruits there because the Dwemer ruins are death traps.