The most abused verse is the above. This verse is a lifeline. When a verse says that, “AT ANY TIME” Father is not seen (John 1:18, John 5:37). Some would use this lifeline saying, In God, nothing is impossible, if He wants to be seen, He can.
When someone says that creation did not happen in literal 6 days as in like 144hours, some would use this lifeline saying, In God, nothing is impossible, if He can create everything in a snap of a finger, He can.
When someone says, the flesh is not per se the Father rather, the manifestation of the Father which means the Father is in the Flesh, not the Father is the Flesh, some would use this lifeline saying, In God, nothing is impossible, if He can be the flesh Himself, He can.
Well, since everything is possible with God. Why did He not save Man at the moment the man sinned? Why did He not, at the snap of His finger save once and for all mankind at this very moment? Nothing is impossible, right?
Then, they would use the verse in Ecc 3:1-18 that says, its because though nothing is impossible with God, everything has a season, there is a process for everything, even God uses a process to create and to save.
This is basically my answer too, though He can be seen if He wants to, He did this indirectly through His created visible Image (Son) which, through this Image, He is seen. This Image though being made alive by the Father also has a life of its own in a sense that, the Image of the Invisible God or the Son has a will of its own which is in sync with the will of the Father so that, whatever the Father purpose or wish to do is being done through the Son in an exact manner the Father wishes it to be done (John 5:19).
This Image of the Invisible God was the first-ever creation of the Father (Col 1:15) to which, because He willfully choose to obey the will of the Father obtains by inheritance the name of the Father, and since they are in one accord, the Image of the invisible God was permitted to speak in the first person as if He was His father in the old testament. This was before He was sent to manifest in the flesh, after all, He also has the name of the Father made known only when the Son was sent to become the Flesh.