“Whenever the tabernacle is to move, the Levites must take it down, and whenever the tabernacle is to be reassembled, the Levites must set it up. Any unauthorized person who approaches it must be killed.”
God gives definite responsibilities to specific people. He has always done this. The Levites, and they alone, were tasked with taking down and setting up the tabernacle in the wilderness.
Did others have the ability to do what the Levites were supposed to do? Absolutely! But they were not authorized to do it. The same principle applies today for elders, men in worship, support of widows, etc.