Bismillah
as salam alykom
Alright Karbala, I m usually inclined towards using my mind (or more to say the ability of reasoning Allah Blessed mankind with). Actually mankind was blessed with this advantage which puts mankind on a higher rank than angels since we have also the ability to decide and make choices.
Now to start with, what is the purpose of worship in general?? To obey Allah, to pay gratitude to Allah, to come closer to Allah, to protect us against ourselves and shaytan (since even in the acts or worship and obedience we have to do what pleases Allah not ourselves, i.e if a woman likes to go out and attend Halaqa but she leaves her husband and children unattended, it is a no situation).
Thus, any act of worship reflects back on the worshiper in two or even multi forms. But at least the two evident is being closer to Allah, and feeling better because one is freed from any other influence but Allah's.
In light of the above, one must always gauge the impact of any act according to such criteria. What would I gain, how will I come closer to Allah?
Why do we go to Ka`aba at all? (I will focus first on this issue). Among others, because going for Haj is a must - so long a Muslim is capable - it is a Fard but a conditional one depending on the ability. As for Ummrah it is a Sunnah - following the Messenger prayer and peace be upon him that results into (according to hadeeth) expiation of sins, renewing the covenant with Allah, maintaining the relation with Allah, scrubbing the heart, ..etc. Because praying one Raka`a in Masjed Haram equals 100,000.
What do we do when we go there? We perform the act in way that follows the sunnah in the rituals, to be sticking to sunnah…
Besides each act of worship when u really ponder upon them and reflect, does have a logical meaning and impact on the human being as a person . For example and on the same theme:
Why do we strive to go to Masjed Nabawy and strive even more to attain the honor of praying in Rawda Sharifa? Because the Messenger prayer and peace be upon him said and stated and explained that the space located between his house and his pulpit is considered a Rawda of Jannah (prayer and peace be upon our beloved teacher and leader and Messenger ameen). And also as he explained that praying 1 Raka there equals a 1000 elsewhere. Why do we do our best to visit Masjed Qubaa and pray even two Rakaa because according to a hadeeth the Messenger prayer and peace be upon him told us that praying there two Rakaa one would attain the reward of performing Ummrah.
So how will kissing a modern constructed and renovated gate benefit u? Modern gates of Masjed Nabawy including that of Jebreel or others (built and renovated during the 20th century) - which in itself not more precious in the eyes of Allah than mankind.
Would u for instance kiss the Intercontinental hotel room door just because it is in Mecca? Unlike of course if it was in Sand Fransisco or anywhere else?? It is the same thing. This is a door and that is a door. How will kissing a gate allows you to strengthen your faith? Or allows you to attain Allah’s love as if u perform Nafawel in order to come closer to Allah.