Many people who read and study Pentateuch always wonder why all of these boring, minuscule and seemingly unimportant, irrelevant technical details of the Tabernacle take such a large portion of the Book of Exodus.
As I have pointed out on many occasions, the answer to this extremely important question is right in the original text.
Let's take a look at Exodus 25:8
8 And let them make me a sanctuary; that I may dwell among them. [KJV]
8 And they have made for Me a sanctuary, and I have tabernacled in their midst [YLT]
8 Thus they will make for Me a sanctuary, and I will tabernacle in their midst. [CLV]
8 wə‘āśû lî miqədāš wəšāḵanətî bəṯwōḵām: [tr]
8 וְעָ֥שׂוּ לִ֖י מִקְדָּ֑שׁ וְשָׁכַנְתִּ֖י בְּתוֹכָֽם׃
This verse implies, that if we want to have God's presence to dwell[ושכנתי] among us, WE [ועשו] must build Him a proper House [לקרשי].
This means that all of these technical details are provided to us for a reason. This means that it is US who will have to build a place for God to dwell among us!
It does not matter if it is going to be a Temple, a House, or a Tabernacle. What matters is that these particular specifications provided in the original text are included and accounted for in the design of this particular dwelling.
It is up to US to build the dwelling for God's presence. The dwelling of God is not going to magically appear out of nowhere or descent from Heavens in a ready-to-use state.
It is OUR responsibility to build proper, righteous dwelling for One God. No one else's !!!
Only then He will be willing to dwell in our midst. And since it is WE who are required to build Him His dwelling, all of these technical details of the Tabernacle description are essential and indispensable if we ever hope to accomplish this task.