// Wouldn't it make more sense to make the legal process shorter and less unnecessarily bureaucratic so that people are less likely to come in the country undocumented?

Lowering the bar until the kinds of people who are happy to break the law to come here are now legal is not the goal.

Immigration policy changes all the time. H1B was not a thing until the 90s. The country has the right to evaluate what it needs at a given time.