Identifying species is an advanced task in real life, but species presents laypeople with a sometimes impossibly high standard for mapping. I distinctly recall cleaning up after a whole high school class on an assignment to map the locations of foraging options around town. They did a good job identifying roses and crabapple trees, but this class taught geography, not biology or Latin, so all they tagged were common names in English.
The students could’ve tagged species:en and left it to another mapper to translate the common names into scientific names. But the more experienced mapper would’ve likely relied on a copyrighted, “all rights reserved” source to make this translation, if they could even do so without conducting a followup survey. A common name like “palm” can refer to many species and subspecies, and different authorities sometimes disagree on the proper classification of a species. At least species:wikidata can be useful no matter the value’s precision.
(I was really stumped about the sheer number of species=banana they had identified in this snowy climate where tropical fruits fare poorly. It turns out the kids had identified a kind of weed commonly called a “plaintain”. I lost my appetite at this point.)
By the way, species can sometimes be limiting when mapping athletic fields. This American football field is surfaced in a specific trademarked hybrid cultivar of grass, apparently significant because the last variety failed spectacularly. With all the attention that golf mappers pay to the finer points of gameplay, maybe a future game could even use Wikidata statements about the grass variety’s specifications to adjust the golf ball’s behavior. 
I assume you’re referring to the problem of Wikipedia tags becoming outdated because of articles getting renamed. Wikidata IDs are much more stable, generally only changing for good reasons and redirecting from the old ID just in case. Of course, no self-respecting identifier scheme for the sum of human knowledge can be perfectly permanent, and to put things in perspective, OSM’s are less persistent than industry norms.