Ironically, You just made the case for why!
That was over 55 years ago, Discovery was a monumental moment and they wanted to give it the proper weight because it was so rare and with modern vfx.
So to keep score:
One visit to the barrier with prototype 1966 vfx in the pilot. Described the psi effects, but focused more on the powers and "sickness", not the barrier or it's implications.
2 visits with re-used stock footage where the crossing was an afterthought. .
A visit outside the galaxy where they basically jumped and avoided showing or talking about the barrier altogether, and...
A whole episode exploring what it is and the effects of breaking though the barrier with A-level 2022 vfx. An exploration story on the way to finding out even more information. It was a link in a chain, not filler.