The easiest way to avoid that, is to read the OP and learn some of the important differences between evolution and the creationist idea called "evolutionism."
Evolution is "a change in allele frequency in a population over time." So yes, that's what evolution is. You're thinking of "evolutionism".
That's only part of evolution. Yes, recombination does change allele frequencies. But as you learned, it also involves new alleles by mutation. Would you like me to show you some of that, again?
The actual theory of evolution. Creationists prefer "evolutionism"; because they invented it, they can make it whatever they want it to be.
Directly observed in bacteria. But there are other examples in animals would you like to see some?
EVERY believer in evolutionism here simply breaks out the coloring book and assumes it can't happen. Being creationists, they designed evolutionism to exclude real evolution.
Evolutionism can't explain this, but evolutionary theory does. It's really not complex. In any given generation, new alleles that make organisms more likely to survive long enough to reproduce, tend to have a larger distribution in the next generation. So the next generation has a different allele frequency. But then, again, any useful new alleles will tend to leave more copies, changing the allele frequency again in the next generation.
For the study, the researchers sequenced the whole genomes of 27 Tibetans. As they looked for advantageous genes, Huff’s team flagged two that are already known to confer adaptations at high altitudes, namely variants to EPAS1 and EGLN1. Both of these gene variants are activated when oxygen levels are low, triggering production of more hemoglobin—a protein in red blood cells that carries oxygen throughout the body. These genes stave off hypoxia, a dangerous condition that happens when the body is deprived of oxygen.
But the researchers also found variations to three human genes that hadn’t previously been associated with high altitude adaptations. Two of these genes, PTGIS and KCTD12, have been shown in prior studies to be related to low oxygen levels and hypoxia, while VDR is known to play a role in vitamin D metabolism. Tibetan nomads are susceptible to vitamin D deficiency on account of their limited diets, and the VDR gene compensates for that.
All of these gene variants, except for EPAS1, emerged through mutations among the ancient Tibetans.
http://gizmodo.com/key-mutations-show-how-tibetans-thrive-at-high-elevatio-1794709789
C'mon. You've already seen examples. Here's another one.
Ah, "micro-evolutionism" is a new one. You guys are creative, I'll grant you that. But there really is no difference between microevolution and macroevolution, except that macroevolution results in a new species. In fact there are cases where microevolution could retroactively become macroevolution from the same change in alleles. Would you like to learn how that could happen?
The OP has a short comparison between evolution and the creationist invention called "evolutionism." Read it and learn.