From our everyday experience we know that the greater the intelligence and skill of a person making something, the less time is required to make it. Conversely, the less intelligence and skill, the more time is required.
Thus, if things have come about naturalistically, that is without any planning or design or intelligent input, enormous amounts of time are required. Reliance on random processes is the least intelligent and least efficient way of producing anything.
As random processes are all that is available to bring things about naturalistically, the age of the universe would need to be very great indeed if we were to reach the complex state of affairs we have at present through random processes. That is of course allowing the enormous assumption that random processes could achieve it at all! Evolution therefore is absolutely locked into an old earth and an old universe.
On the other hand, if there is a Creator who has maximum skill and intelligence, the time required for Him to make things approaches zero. From a creation viewpoint, then, a long time-span is not necessary for the production of the universe.
Of course we can only know how long it took if the Creator tells us. And He has. He says He chose to do it in six days. Once an intelligent Creator is allowed, a strident insistence that the earth and universe are old is not necessary.