At hazoor sahib, arti-arta tradition is been going seena basina along with budda dal panjva takht.
All the mahapursh in the past have encourage students never to criticize takth sahiban maryada and always do satkar of them despite of differences in samparda maryada. In Gurmat Maryada pustak, sant baba gurbachan singh ji bhindranwale mentions how one shouldn't criticize takht sahiban maryada he mentions how he does not agree with arti-arta concept in sachkhand hazoor sahib but despite of that, it holds hazoor sahib maryada at high esteem.
One should take all panj takhth sahiban maryada at very high esteem when they do anything for the panth or in panthic circle but when it comes personal sikhi, one can follow sampardai maryada. It's very simple concept that is still used when you learn sikhi through mahapursh, that avoids all the conflicts of my samparda's maryada is right and others are wrong.
At the end of day,arti-arta just like chaur sahib is part of acharan bhakti (one of 9 bhakti) listed in sri guru granth sahib ji, its way of showing devotion to sargun paratma- saroop of sri guru granth sahib ji..its a ritual..ritual isn't neccessary bad but its the person who is doing the ritual need to have clear understanding or fine line between when ritual is performed as devotion to sargun paratma and when ritual is performed as pure dogma..!!..this applies to pretty much every ritual in the panth not just arti-arta.
At the end of day, its a small thing nothing big too loose your sleep over..!!