What would be the reasonable explanation that 12 billion years ago stars formed faster than they do a billion years ago? Don't stars form by a natural laws that are unchanging?
That is not my point. It's not a stretch at all to concede stars form faster in certain environments. I was talking about physical laws.
Believe everything you're told, not matter how ridiculous, no matter how unprovable?** That's what children do. ** unprovable (ʌnˈpruːvəbəl) adj not able to be proved or verified https://www.thefreedictionary.com/unprovable
In addition to natural laws involved with star formation, stars only form is there is sufficient matter available, specifically hydrogen gas. Much of the hydrogen gas which existed in the past is either (i) located in previously formed stars and/or (ii) has been changed into other atomic elements due to stellar processes inside those stars. Thus, there is less free hydrogen available for star formation. Short version: Without hydrogen no stars can form regardless of the natural laws which govern star formation.
Now that makes sense. So we are thinking that there was more hydrogen gas 12 billion years ago that together with what is called natural law, explains why stars formed faster long ago, when compared to more recent times? Logical, although I know so little about this field to really know much about it. But logically that looks very possible.
Stars did not necessarily form any faster on an individual basis (they could have if the hydrogen clouds from which they arose were denser or more voluminous to begin with, which likely occurred but did not always occur). The process of stellar formation has remained the same, at least according to current cosmology/astronomy/stellar theory. However, more stars in overall quantity formed in earlier epochs than are forming these days. The main variable, again, is the amount and location of hydrogen gas. Easy peasy.
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars. We know gaseous areas in our own galaxy breed stars at a faster rate than other areas. It is highly likely there are other galaxies now and past besides the one discovered that do the same. It is a virtual statistical certainty given the size of the universe and the number of galaxies then and now.